We offer a complete spectrum of eye care, including refractive surgery (PRK and LASIK). Office surgeries are performed in our two modern operating suites. Intraocular surgeries, including cataracts and glaucoma, are performed at our local hospitals (McKay-Dee Hospital and Ogden Regional Medical Center). Laser surgery for glaucoma, retinal conditions, including diabetic eye disease, and facial plastic surgery procedures such as blepharoplasties, endoscopic brow lifts, and facial fillers are performed in our eye center.

When a ray of light emerges obliquely from glass into air, the angle of refraction between ray and normal is greater than the angle of incidence inside the glass, and at a sufficiently high obliquity the angle of refraction can actually reach 90°. In this case the emerging ray travels along the glass surface, and the sine of the angle of incidence inside the glass, known as the critical angle, is then equal to the reciprocal of the refractive index of the material. At angles of incidence greater than the critical angle, the ray never emerges, and total internal reflection occurs, for there is no measurable loss if the glass surface is perfectly clean. Dirt or dust on the surface can cause a small loss of energy by scattering some light into the air.

Doctors of Optometry (O.D.) (optometrists) function as primary eye care providers, although ophthalmologists also share the same role. The scope of optometry has expanded in modern times. Optometrists in the US are trained and licensed to diagnose and manage all eye diseases. They can prescribe all topical medications (prescription eye drops) and most some oral medications, as well as administer diagnostic agents.[45][46][47] In some states, optometrists may also be licensed to perform certain types of eye surgery.[48]
Lenses have occasionally been made with one surface taking the form of a flattened cone. Such lenses produce a long, linear image of a point source, lying along the lens axis; for this reason they are commonly referred to as axicons. They have been used to produce a straight line of light in space for aligning machines and shafting, but since about 1965 the beam from a gas laser has generally been used instead.

The National Board of Examiners in Optometry serves to protect the public and the optometric profession through the development, administration, scoring and reporting of valid examinations that evaluate competence. "We believe these changes are appropriate," said NBEO President Elizabeth Hoppe, OD, MPH, DrPH. "After much discussion and consultation with the Association of Regulatory Boards of Optometry (ARBO), and their member boards, it became apparent that this is a critical step towards ensuring protection of the public and the integrity of the examinations."
Light is totally internally reflected in many types of reflecting prism and in fibre optics, in which long fibres of high-index glass clad with a thin layer of lower index glass are assembled side-by-side in precise order. The light admitted into one end of each fibre is transmitted along it without loss by thousands of successive internal reflections at the interlayer between the glass and the cladding. Hence, an image projected upon one end of the bundle will be dissected and transmitted to the other end, where it can be examined through a magnifier or photographed. Many modern medical instruments, such as cystoscopes and bronchoscopes, depend for their action on this principle. Single thick fibres (actually glass rods) are sometimes used to transmit light around corners to an otherwise inaccessible location.
Originally, the term optics was used only in relation to the eye and vision. Later, as lenses and other devices for aiding vision began to be developed, these were naturally called optical instruments, and the meaning of the term optics eventually became broadened to cover any application of light, even though the ultimate receiver is not the eye but a physical detector, such as a photographic plate or a television camera. In the 20th century optical methods came to be applied extensively to regions of the electromagnetic radiation spectrum not visible to the eye, such as X-rays, ultraviolet, infrared, and microwave radio waves, and to this extent these regions are now often included in the general field of optics.
To get the most out of the best eye care technology in our office, we’ve built a team here at Country Hills Eye Center that is filled with professionals that are masters at providing the high-quality eye care that you deserve. Our practice has five board certified ophthalmologists, with each specializing in specific areas of eye care such as oculoplastic surgery, glaucoma, corneal, neuro-ophthalmology, and surgical treatment of retina and vitreous diseases. No matter what kind of eye care that you need, we have an expert on staff that is ready to help you restore your vision to what it should be: completely clear. We also have a friendly and experienced eye care staff that supports the doctors, is always there to answer your questions, and makes sure that your experience with us is as comfortable as possible. When you choose Country Hills Eye Center, you can be confident that you’re vision is in the best hands. 

"It was a fantastic experience, my daughter was upset with having to get eye drops and the technician that came in was very soothing and so nice. She calmed my daughter down and let her do everything on HER terms. Previous offices have had to hold her down to do the drops, and I absolutely loved the fact that everything was done when my daughter was ready."

Our board certified physicians specialize in a wide range of ophthalmic services, including the treatment of basic vision problems, cataracts, glaucoma, dry eyes, eyelid disorders, diabetic eye disease, and retinal disorders. We utilize the latest techniques in LASIK vision correction surgery, cataract surgery, retinal surgery, and plastic surgery to ensure the best possible visual outcomes.
Retinal imaging technology helps us to capture images of the structures in back of the eye. This allows us to evaluate the retina for changes that can be associated with systemic conditions like hypertension and diabetes as well as diseases related to the retina and the optic nerve. This technology can also help us to monitor for changes over time.
In 1990, a survey of the opinions of British medical practitioners regarding the services provided by British optometrists was carried out by Agarwal[41] at City, University of London. A majority of respondents were in favour of optometrists extending their professional role by treating external eye conditions and prescribing broad spectrum topical antibiotics through additional training and certification.
It is to be noted that the five Seidel aberrations represent the largest and most conspicuous defects that can arise in an uncorrected optical system. Even in the best lenses in which these five aberrations have been perfectly corrected for one zone of the lens and for one point in the field, however, there will exist small residuals of these aberrations and of many other higher order aberrations also, which are significantly different from the classical types just described. The typical aberration figures shown in Figure 8 are, of course, grossly exaggerated, and actually it requires some magnification of a star image to render these appearances clearly visible. Nevertheless, they are important enough to require drastic reduction in high-quality lenses intended to make sharp negatives capable of considerable enlargement.
The Institute of Vision and Optics (IVO) of the University of Crete focuses on the sciences of vision and is active in the fields of research, training, technology development and provision of medical services. Professor Ioannis Pallikaris has received numerous awards and recognitions for the Institute's contribution to ophthalmology. In 1989 he performed the first LASIK procedure on a human eye.

Dr. Brianne Hobbs has been named the Associate Director of Examination Innovation. Prior to joining the NBEO, Dr. Hobbs served as an Associate Professor and the Director of Residencies at the Midwestern University Arizona College of Optometry. While there she was involved with the initial development of the curriculum and led the establishment of the internal and external residency programs. She has served as a member of the NBEO Part I ABS® development committee since 2014, and is an author of two columns focusing on evidence-based clinical care.

Dave grew up in the Seattle area and attended undergraduate school at the University of Washington and Whitman College. He graduated from Pacific University College of Optometry with honors in 1982. Outside of the office, Dave enjoys spending time with his family, cross country skiing, playing tennis and gardening. Dave retired from the EyeCare Center in December of 2015 after practicing over 30 years to enjoy time with his family.

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Nope I came back to inform the dr the contacts were uncomfortable he failed to inform me it was a monthly pair he didn't give me a case when I left so unfortunately I didn't get to try them on longer and had to dispose of them that night.. but I did go back the same day getting them and he said I don't prescribe blurry contacts and you just have to wear them longer ... he definitely is not open to what you have to say which is sad because I have to settle for something uncomfortable I didn't go back I don't need that type of negativity .. receptionists was super kind I wish he was the doctor ...
Improved screen materials have been developed to increase the brightness of the picture to suit the particular shape of the auditorium. A screen covered with tiny beads tends to send the light back in the general direction of the projector, and is suitable for use at one end of a long, narrow auditorium. Another type of screen is covered with fine embossed vertical grooves; this tends to distribute the light in a horizontal band across the audience with little or no vertical spread. A real advantage of these highly reflective screens is that they tend to reflect ambient room light away from the viewer as by a mirror, so that the pictures appear almost as bright and clear by day as in a darkened room.
Previously, testing the RemoveDEBRIS system has meant checking out its fundamentals—using a net to simulate a capture, using onboard LIDAR and optical camera systems to identify space junk. — David Grossman, Popular Mechanics, "Watch a Space Junk Harpoon Complete a Successful Test Shot," 15 Feb. 2019 Beyond that, the Command Bar comes with a nice variety of connectivity options: an HDMI-ARC port, two HDMI 2.0 inputs, an optical digital audio input, and Bluetooth support. — Jeff Dunn, Ars Technica, "The Ars Holiday Gift Guide 2018—good tech for the home and home office," 19 Nov. 2018 The Galaxy Note 9, similar to this year’s Galaxy S9, has impressive dual cameras on the back, a wide-angle and a 2X telephoto, both with optical image stabilization. — David Pierce, WSJ, "Samsung’s Galaxy Note 9 Is Crazy Powerful. Can You Handle It?," 19 Aug. 2018 Note that this particular model only accepts analog RCA and 3.5mm audio connections, however—optical inputs aren’t supported. — Alexandria Haslam, PCWorld, "Punch up your PC audio! Logitech's powerful Z623 speaker system is $80, its lowest price ever," 9 Aug. 2018 As in standard optical communications, a photon can be transmitted to a receiver—in this case, another diamond vacancy—and its quantum state transferred to a new electron, so the two electrons become correlated. — Neil Savage, Scientific American, "What Are the Limits of Manipulating Nature?," 8 May 2018 As the show’s 80 or so works, video slide shows and film clips demonstrate, rarely has an optical phenomenon threaded its way through so many aspects of modern culture, from mass-market fads to avant-garde art. — Susan Delson, WSJ, "In a Los Angeles Exhibition, 3-D in All Its Dimensions," 29 June 2018 Similar to sun dogs, lunar and solar halos belong to the family of ice halos, which are optical phenomena formed by the refraction of sun on hexagonal ice crystals suspended high up in the atmosphere, most commonly in cirrus clouds. — Kathryn Prociv, Washington Post, "Skywatchers in Chile were star-struck by this incredible lunar halo," 13 Apr. 2018 During the last decade, the space technology program has supported research into optical communications for communicating with deep space probes, environmental propellants, and nuclear thermal propulsion, among many other areas. — Eric Berger, Ars Technica, "In response to Trump budget, NASA ending separate technology plan," 1 Mar. 2018
All photometric concepts are based on the idea of a standard candle, lamps having accurately known candle power being obtainable from the various national standards laboratories. The ratio of the candle power of a source to its area is called the luminance of the source; luminances range from about 2,000 candles per square millimetre at the surface of the Sun down to about 3 × 10−6 candle per square centimetre (3 × 10−6 stilb) for the luminous paint on a watch dial. Ordinary outdoor scenes in daylight have an average luminance of several hundred candles per square foot. The quantity of light flux flowing out from a source is measured in lumens, the lumen being defined as the amount of flux radiated by a small “point” source of one candle power into a cone having a solid angle of one steradian. When light falls upon a surface it produces illumination (i.e., illuminance), the usual measure of illuminance being the foot-candle, which is one lumen falling on each square foot of receiving surface.
Besides the familiar optical systems cited above, there are many nonclassical optical elements that are used to a limited extent for special purposes. The most familiar of these is the aspheric (nonspherical) surface. Because plane and spherical surfaces are the easiest to generate accurately on glass, most lenses contain only such surfaces. It is occasionally necessary, however, to use some other axially symmetric surface on a lens or mirror, generally to correct a particular aberration. An example is the parabolic surface used for the primary mirror of a large astronomical telescope; another is the elliptic surface molded on the front of the little solid glass reflector units used on highway signs.

Dave grew up in the Seattle area and attended undergraduate school at the University of Washington and Whitman College. He graduated from Pacific University College of Optometry with honors in 1982. Outside of the office, Dave enjoys spending time with his family, cross country skiing, playing tennis and gardening. Dave retired from the EyeCare Center in December of 2015 after practicing over 30 years to enjoy time with his family.
When a well-corrected lens is used in place of a pinhole, the geometrical ray divergence is eliminated by the focussing action of the lens, and a much larger aperture may be employed; in that case the diffraction spreading becomes small indeed. The image of a point formed by a perfect lens is a minute pattern of concentric and progressively fainter rings of light surrounding a central dot, the whole structure being called the Airy disk after George Biddell Airy, an English astronomer, who first explained the phenomenon in 1834. The Airy disk of a practical lens is small, its diameter being approximately equal to the f-number of the lens expressed in microns (0.001 millimetre). The Airy disk of an f/4.5 lens is therfore about 0.0045 millimetre in diameter (ten times the wavelength of blue light). Nevertheless, the Airy disk formed by a telescope or microscope objective can be readily seen with a bright point source of light if a sufficiently high eyepiece magnification is used.
No graphical construction can possibly be adequate to determine the aberration residual of a corrected lens, and for this an accurate trigonometrical computation must be made and carried out to six or seven decimal places, the angles being determined to single seconds of arc or less. There are many procedures for calculating the path of a ray through a system of spherical refracting or reflecting surfaces, the following being typical: The diagram in Figure 4 represents a ray lying in the meridian plane, defined as the plane containing the lens axis and the object point. A ray in this plane is defined by its slope angle, U, and by the length of the perpendicular, Q, drawn from the vertex (A) of the surface on to the ray. By drawing a line parallel to the incident ray through the centre of curvature C, to divide Q into two parts at N, the relation is stated as AN = r sin U, and NM = r sin I. Hence
Ophthalmologists are Medical/Osteopathic Doctors (MD/DO) who specialize in the eye. They provide comprehensive medical and surgical eye care for eye diseases. While ophthalmologists can prescribe corrective lenses, they are primarily trained to manage eye diseases, some involving surgery. Often, ophthalmologists choose to specialize in a particular area of the eye, such as the retina or cornea.

NBEO President, Elizabeth Hoppe, OD, DrPH stated, “We are excited about the future Part III examination and will be asking for feedback from ARBO, the individual regulatory boards, and other stakeholders. NBEO believes that an examination with more application to clinical knowledge is necessary and aligned with our organizational mission of service to the public and the profession. We look forward to sharing more information as this process develops.”
Your eyes are an important part of your health. Most people rely on their eyes to see and make sense of the world around them. But some eye diseases can lead to vision loss, so it is important to identify and treat eye diseases as early as possible. You should get your eyes checked as often as your health care provider recommends it, or if you have any new vision problems. And just as it is important to keep your body healthy, you also need to keep your eyes healthy.
Prior to joining the NBEO, Dr. Sallach was in private practice. She also has experience in healthcare technology and practice management consulting. Dr. Sallach is a member of the American Optometric Association, North Carolina Optometric Society, and president of her local optometry society. Dr. Sallach received her undergraduate degree from The University of Wisconsin-La Crosse, majoring in Biomedical Science. In 2012, she received her Doctor of Optometry from The Ohio State University College of Optometry.
Dr. Brianne Hobbs has been named the Associate Director of Examination Innovation. Prior to joining the NBEO, Dr. Hobbs served as an Associate Professor and the Director of Residencies at the Midwestern University Arizona College of Optometry. While there she was involved with the initial development of the curriculum and led the establishment of the internal and external residency programs. She has served as a member of the NBEO Part I ABS® development committee since 2014, and is an author of two columns focusing on evidence-based clinical care.
American Optometric Association: "Proper Nutrition Is Critical to Eye Health," "Antioxidants and Age-Related Eye Disease," "Diabetes Is the Leading Cause of Blindness Among Most Adults," "Good Vision Throughout Life," "Recommended Eye Exam Frequency for Pediatric Patients and Adults," "Shopping Guide for Sunglasses," "UV Protection With Contact Lenses," "Glaucoma," "Computer Vision Syndrome."
Lenses have occasionally been made with one surface taking the form of a flattened cone. Such lenses produce a long, linear image of a point source, lying along the lens axis; for this reason they are commonly referred to as axicons. They have been used to produce a straight line of light in space for aligning machines and shafting, but since about 1965 the beam from a gas laser has generally been used instead.
To save face, keep the bedding clean from any pollen, dust, and dander that can accumulate on your sheets and pillowcases. It might be helpful to invest in a mattress cover to protect your sensitive eyes from dust mites looking for a cozy rest stop. Remember, pets can cause allergy symptoms to heighten, so consider keeping the animals outside the bedroom.
How are your eye allergies this year? Symptoms are no fun, especially when they begin interfering with your quality of life and the activities you love most. Unfortunately, you’ve probably already discovered that allergens aren’t just outside, either. Watery, itchy eyes can be triggered by pet dander, mold, and dust, in addition to the usual pollen from trees, grass, and plants.
We absolutely love doctor Pickett! He is amazing. However, I had to give this three stars due to one specific receptionist my husband and I have had several horrible encounters with. She's middle aged with light brown hair. I'm not sure what her name is nor do l care to blast her identity. She has not only been really rude and condescending towards me, but has stated my husbands ethnicity and made comments on it several times. First of all, she not only mentions that he is Hispanic several times while commenting on his bad eyes and how it's common with Hispanics, Which is totally not even statistically true, but it's also irrelevant and not important what so ever. Secondly, he is Persian... our dang last name gives it away. It's pretty obvious. That being said the logistics of the situation are not that important. What is inappropriate is that she even comments on race. That's so tacky and rude. I don't sit here and talk about how she is white and a lot of middle aged white people are judgmental jerks now do I? Nope. Race isn't important within choosing eye glasses and shouldn't be mentioned at all. Please train your staff about discrimination and proper business ethics. We still plan on coming into this location as far as I'm concerned and I would have loved to just email this to the company but was unable to find the info in order to accomplish this message.
The case of a star being observed through a telescope is quite different, because no degree of magnification can possibly make a star appear as anything other than a point of light. Hence, star images appear brighter in proportion to the area of the telescope objective (assuming that the exit pupil is larger than the eye pupil), and the visibility of a star against the sky background is thus improved in proportion to the square of the diameter of the telescope objective lens.
If a lens is used to form an image of a plane object that is tilted relative to the lens axis, then the image will also be tilted in such a way that the plane of the object, the plane of the image, and the median plane of the lens all meet. This construction can be derived by the use of the lateral and longitudinal magnification relations just established above. With a tilted object the magnification at any point is given by the ratio of the distances of image and object from the lens at that point in the image, and, consequently, m varies progressively from one end of the image to the other. This arrangement is frequently used in view cameras equipped with “swings” to increase depth of field and in enlargers to rectify the convergence of parallel lines caused by tilting the camera, for example, in photographing tall buildings. The rule finds extensive application in photogrammetry and in the making of maps from aerial photographs.
The difference between the refractive indices of a transparent material for a specific blue light and a specific red light is known as the dispersion of the material. The usual choices of blue and red lights are the so-called “F” and “C” lines of hydrogen in the solar spectrum, named by Fraunhofer, with wavelengths 4861 and 6563 angstroms (the angstrom unit, abbreviated Å, is 10−8 centimetre), respectively. It is generally more significant, however, to compare the dispersion with the mean refractive index of the material for some intermediate colour such as the sodium “D” Fraunhofer line of wavelength 5893 angstroms. The dispersive power (w) of the material is then defined as the ratio of the difference between the “F” and “C” indices and the “D” index reduced by 1, or,
The CBOO (Brazilian Council of Optics and Optometry), which is affiliated to the WCO (World Council of Optometry), represents Brazilian optometrists. In conjunction with organizations representative weight of Brazilian companies, including the National Commerce Confederation for goods, services and tourism (CNC), through the CBÓptica/CNC, its defense arm of optometric and optical industry, are defending the right of free and independent practice of optometrists, even if it is against the interests of ophthalmologists.
To the ancients, the processes of image formation were full of mystery. Indeed, for a long time there was a great discussion as to whether, in vision, something moved from the object to the eye or whether something reached out from the eye to the object. By the beginning of the 17th century, however, it was known that rays of light travel in straight lines, and in 1604 Johannes Kepler, a German astronomer, published a book on optics in which he postulated that an extended object could be regarded as a multitude of separate points, each point emitting rays of light in all directions. Some of these rays would enter a lens, by which they would be bent around and made to converge to a point, the “image” of the object point whence the rays originated. The lens of the eye was not different from other lenses, and it formed an image of external objects on the retina, producing the sensation of vision.

Polarizing filters have the property of transmitting light that vibrates in one direction while absorbing light that vibrates in a perpendicular direction. These filters are used extensively in scientific instruments. In sunglasses and when placed over a camera lens, polarizing filters reduce unwanted reflections from nonmetallic surfaces. Polarizing spectacles have been used to separate the left-eye and right-eye beams in the projection of stereoscopic pictures or movies.
The NBEO examinations are designed to assure state boards that those candidates who pass the three parts demonstrate entry level competence to practice the profession of optometry. ARBO President Dr. Richard Orgain states, "This step shows that the NBEO takes its responsibility and commitment to the state boards very seriously. We are pleased to see NBEO following medicine in its adoption of a six-time attempt limit."
Jordan Vision Clinic is a full service eye and vision care provider and will take both eye emergencies as well as scheduled appointments. Patients throughout the West Jordan area come to Jordan Vision Clinic because they know they will receive the personal attention and professional care that is our foundation. Our team is dedicated to keeping our patients comfortable and well-informed at all times. At Jordan Vision Clinic, we will explain every exam and procedure and answer all of our patient's questions. Additionally, at Jordan Vision Clinic, we offer vision financing options and will work with vision insurance providers to ensure good eye health and vision care for all of our patients.

/op·tom·e·try/ (op-tom´ĕ-tre) the professional practice consisting of examination of the eyes to evaluate health and visual abilities, diagnosis of eye diseases and conditions of the eye and visual system, and provision of necessary treatment by the use of eyeglasses, contact lenses, and other functional, optical, surgical, and pharmaceutical means as regulated by state law.
Optometrists meet with patients and perform different tests to determine common eyesight issues, such as near- or farsightedness, for which they can prescribe glasses or contacts. They can also test patients for eye diseases, such as glaucoma, for which they can prescribe medicines. Optometrists can also perform vision therapy for other issues, such as eye-movement or eye-tracking problems. Sometimes optometrists run across a problem like diabetic retinopathy, which is symptomatic of a systemic problem like diabetes. 
The profession of Optometry has been represented for over a century by the Association of Optometrists, Ireland [AOI]. In Ireland an optometrist must first complete a four-year degree in optometry at Dublin Institute of Technology. Following successful completion of the degree, an optometrist must then complete professional qualifying examinations to enter the register of the Opticians Board [Bord na Radharcmhaistoiri]. Optometrists must be registered with the Board to practice in the Republic of Ireland.