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Congenital Cataract
3801 W. 15th St., Bldg. A, Ste. 110 Plano, TX 75075 Phone: (972) 758-0625 Fax: (972) 964-5725 Email: [email protected] Website: www.drstagerjr.com Congenital Cataract Your eye works a lot like a camera. Light rays focus through the lens on the retina, a layer of light-sensitive cells at the back of the eye. Similar to photographic film, the retina allows the image to be “seen” by the brain. Over time, the lens of our eye can become cloudy, preventing light rays from passing clearly through the lens. The loss of transparency may be so mild that vision is barely affected, or it can be so severe that no shapes or movements are seen—only light and dark. When the lens becomes cloudy enough to obstruct vision to any significant degree, it is called a cataract. Eyeglasses or contact lenses can usually correct slight refractive errors caused by early cataracts, but they cannot sharpen your vision if a severe cataract is present. The most common cause of cataract is aging. Occasionally, babies are born with cataracts or develop them very early in life. This condition is called congenital cataract. There are many causes of congenital cataract. Certain diseases can cause the condition, and sometimes it can be inherited. However, in most cases, there is no identifiable cause. Treatment for cataract in infants varies depending on the nature of each patient’s condition. Surgery is usually recommended very early in life, but many factors affect this decision, including the infant’s health and whether there is a cataract in one or both eyes. -
Accommodation in the Holmes-Adie Syndrome by G
J Neurol Neurosurg Psychiatry: first published as 10.1136/jnnp.21.4.290 on 1 November 1958. Downloaded from J. Neurol. Neurosurg. Psychiat., 1958, 21, 290. ACCOMMODATION IN THE HOLMES-ADIE SYNDROME BY G. F. M. RUSSELL From the Neurological Research Unit, the National Hospital, Queen Square, London In 1936, Bramwell suggested that the title response to near and far vision respectively. But it "Holmes-Adie syndrome" be given to the clinical has also been noted that the reaction to convergence complex of a slowly reacting pupil and absent tendon may be remarkably wide in its range, considering reflexes in recognition of the descriptions by Holmes that it often follows a stage of complete paralysis (1931) and Adie (1932). Both authors had empha- (Strasburger, 1902). Not only is the reaction to sized the chief clinical features-dilatation of the convergence well preserved when compared to the pupil, apparent loss of the reaction to light, slow reaction to light, but it may in fact be excessive constriction and relaxation in response to near and (Alajouanine and Morax, 1938; Heersema and distant vision, and partial loss of the tendon reflexes. Moersch, 1939). In assessing the degree of tonicity Although the syndrome had been recognized wholly there are, therefore, two criteria: slowness ofguest. Protected by copyright. or in part many years previously (Strasburger, 1902; pupillary movement and preservation of the range Saenger, 1902; Nonne, 1902; Markus, 1906; Weill of movement. and Reys, 1926), credit must go to Adie for stressing Adler and Scheie (1940) showed that the tonic the benign nature of the disorder and distinguishing pupil constricts after the conjunctival instillation it clearly from neurosyphilis. -
Prescription Companion
PRESCRIPTION COMPANION ©2012Transitions Optical inc. ophthalmic lens technical reference JUBILEE YEAR 2012 E -Edition 7 www.norville.co.uk Introduction and Page Index The Norville Companion is a supporting publication for our Prescription Catalogue, providing further technical details, hints and ideas gleaned from everyday experiences. TOPIC Page(s) TOPIC Page(s) Index 2 - 3 Part II Rx Allsorts Lens Shapes 4 - 6 Lens Forms 49 Effective Diameter Chart 7 Base Curves 50 - 51 Simplify Rx 8 Aspherics 52 - 53 Ophthalmic Resins 9 Free-form Digital Design 54 Indices of Ophthalmic lenses - Resin 10 Compensated Lens Powers 55 - 56 Polycarbonate 11 Intelligent Prism Thinning 57 - 58 Trivex 12 - 13 Superlenti - Glass 59 Resin Photochromic Lenses 14 Superlenti - Resin 60 Transitions Availability Check List 15 V Value / Fresnels 61 Nupolar Polarising Lenses 16 E Style Bifocal / Trifocal 62 Drivewear Lenses 17 - 18 Photochromic / Glazing / Prisms 63 UV Protective Lenses 19 Lens Measures 64 Norville PLS Tints 20 Sports 65 Tinted Resin Lenses 21 3D Technology Overview 66 Mid and High Index Resins Tintability 22 Rx Ordering 67 Norlite Tint Transmission Charts 23 - 25 Order Progress 68 Norlite Speciality Tinted Resins 26 - 31 Rx Order Form 69 Norlite Mirror Coating 32 Queries 70 Reflection Free Coating 33 - 34 Optical Heritage 71 F.A.Q. Reflection Free Coatings 35 - 37 Rx House - Change afoot? 72 - 73 Indices of Ophthalmic Lenses - Glass 38 Remote Edging 74 Glass Photochromic Lenses 38 Remote edging - F.A.Q. 75 Speciality Absorbing Glass 39 Quality Assurance -
The Eye Is a Natural Optical Tool
KEY CONCEPT The eye is a natural optical tool. BEFORE, you learned NOW, you will learn •Mirrors and lenses focus light • How the eye depends on to form images natural lenses •Mirrors and lenses can alter • How artificial lenses can be images in useful ways used to correct vision problems VOCABULARY EXPLORE Focusing Vision cornea p. 607 How does the eye focus an image? pupil p. 607 retina p. 607 PROCEDURE 1 Position yourself so you can see an object about 6 meters (20 feet) away. 2 Close one eye, hold up your index finger, and bring it as close to your open eye as you can while keeping the finger clearly in focus. 3 Keeping your finger in place, look just to the side at the more distant object and focus your eye on it. 4 Without looking away from the more distant object, observe your finger. WHAT DO YOU THINK? • How does the nearby object look when you are focusing on something distant? • What might be happening in your eye to cause this change in the nearby object? The eye gathers and focuses light. The eyes of human beings and many other animals are natural optical tools that process visible light. Eyes transmit light, refract light, and respond to different wavelengths of light. Eyes contain natural lenses that focus images of objects. Eyes convert the energy of light waves into signals that can be sent to the brain. The brain interprets these signals as shape, brightness, and color. Altogether, these processes make vision possible. In this section, you will learn how the eye works. -
Patient Instruction Guide
1‐DAY ACUVUE® MOIST Brand Contact Lenses 1‐DAY ACUVUE® MOIST Brand Contact Lenses for ASTIGMATISM 1‐DAY ACUVUE® MOIST Brand MULTIFOCAL Contact Lenses etafilcon A Soft (hydrophilic) Contact Lenses Visibility Tinted with UV Blocker for Daily Disposable Wear PATIENT INSTRUCTION GUIDE CAUTION: U.S. Federal law restricts this device to sale by or on the order of a licensed practitioner. 1 TABLE OF CONTENTS TABLE OF CONTENTS ............................................................................................................................................... 2 INTRODUCTION ....................................................................................................................................................... 3 SYMBOLS KEY .......................................................................................................................................................... 4 UNDERSTANDING YOUR PRESCRIPTION ................................................................................................................. 5 GLOSSARY OF COMMONLY USED TERMS ............................................................................................................... 5 WEARING RESTRICTIONS & INDICATIONS ............................................................................................................... 6 WHEN LENSES SHOULD NOT BE WORN (CONTRAINDICATIONS) ............................................................................ 6 WARNINGS ............................................................................................................................................................. -
Intraocular Lenses and Spectacle Correction
MEDICAL POLICY POLICY TITLE INTRAOCULAR LENSES, SPECTACLE CORRECTION AND IRIS PROSTHESIS POLICY NUMBER MP-6.058 Original Issue Date (Created): 6/2/2020 Most Recent Review Date (Revised): 6/9/2020 Effective Date: 2/1/2021 POLICY PRODUCT VARIATIONS DESCRIPTION/BACKGROUND RATIONALE DEFINITIONS BENEFIT VARIATIONS DISCLAIMER CODING INFORMATION REFERENCES POLICY HISTORY I. POLICY Intraocular Lens Implant (IOL) Initial IOL Implant A standard monofocal intraocular lens (IOL) implant is medically necessary when the eye’s natural lens is absent including the following: Following cataract extraction Trauma to the eye which has damaged the lens Congenital cataract Congenital aphakia Lens subluxation/displacement A standard monofocal intraocular lens (IOL) implant is medically necessary for anisometropia of 3 diopters or greater, and uncorrectable vision with the use of glasses or contact lenses. Premium intraocular lens implants including but not limited to the following are not medically necessary for any indication, including aphakia, because each is intended to reduce the need for reading glasses. Presbyopia correcting IOL (e.g., Array® Model SA40, ReZoom™, AcrySof® ReStor®, TECNIS® Multifocal IOL, Tecnis Symfony and Tecnis SymfonyToric, TRULIGN, Toric IO, Crystalens Aspheric Optic™) Astigmatism correcting IOL (e.g., AcrySof IQ Toric IOL (Alcon) and Tecnis Toric Aspheric IOL) Phakic IOL (e.g., ARTISAN®, STAAR Visian ICL™) Replacement IOLs MEDICAL POLICY POLICY TITLE INTRAOCULAR LENSES, SPECTACLE CORRECTION AND IRIS PROSTHESIS POLICY NUMBER -
Prominent and Regressive Brain Developmental Disorders Associated with Nance-Horan Syndrome
brain sciences Article Prominent and Regressive Brain Developmental Disorders Associated with Nance-Horan Syndrome Celeste Casto 1,†, Valeria Dipasquale 1,†, Ida Ceravolo 2, Antonella Gambadauro 1, Emanuela Aliberto 3, Karol Galletta 4, Francesca Granata 4, Giorgia Ceravolo 1, Emanuela Falzia 5, Antonella Riva 6 , Gianluca Piccolo 6, Maria Concetta Cutrupi 1, Pasquale Striano 6,7 , Andrea Accogli 7,8, Federico Zara 7,8, Gabriella Di Rosa 9, Eloisa Gitto 10, Elisa Calì 11, Stephanie Efthymiou 11 , Vincenzo Salpietro 6,7,11,*, Henry Houlden 11 and Roberto Chimenz 12 1 Department of Human Pathology in Adult and Developmental Age “Gaetano Barresi”, Unit of Emergency Pediatric, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy; [email protected] (C.C.); [email protected] (V.D.); [email protected] (A.G.); [email protected] (G.C.); [email protected] (M.C.C.) 2 Unit of Ophthalmology, Department of Clinical and Experimental Medicine, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy; [email protected] 3 Casa di Cura la Madonnina, Via Quadronno 29, 20122 Milano, Italy; [email protected] 4 Department of Biomedical, Dental Science and Morphological and Functional Images, Neuroradiology Unit, University of Messina, Via Consolare Valeria 1, 98125 Messina, Italy; [email protected] (K.G.); [email protected] (F.G.) 5 Azienza Ospedaliera di Cosenza, Via San Martino, 87100 Cosenza, Italy; [email protected] 6 Pediatric Neurology and Muscular Diseases Unit, -
Asymmetries of Dark and Bright Negative Afterimages Are Paralleled by Subcortical on and OFF Poststimulus Responses
1984 • The Journal of Neuroscience, February 22, 2017 • 37(8):1984–1996 Systems/Circuits Asymmetries of Dark and Bright Negative Afterimages Are Paralleled by Subcortical ON and OFF Poststimulus Responses X Hui Li,1,2 X Xu Liu,1,2 X Ian M. Andolina,1 Xiaohong Li,1 Yiliang Lu,1 Lothar Spillmann,3 and Wei Wang1 1Institute of Neuroscience, State Key Laboratory of Neuroscience, Key Laboratory of Primate Neurobiology, Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai 200031, China, 2University of Chinese Academy of Sciences, Shanghai 200031, China, and 3Department of Neurology, University of Freiburg, 79085 Freiburg, Germany Humans are more sensitive to luminance decrements than increments, as evidenced by lower thresholds and shorter latencies for dark stimuli. This asymmetry is consistent with results of neurophysiological recordings in dorsal lateral geniculate nucleus (dLGN) and primary visual cortex (V1) of cat and monkey. Specifically, V1 population responses demonstrate that darks elicit higher levels of activation than brights, and the latency of OFF responses in dLGN and V1 is shorter than that of ON responses. The removal of a dark or bright disc often generates the perception of a negative afterimage, and here we ask whether there also exist asymmetries for negative afterimages elicited by dark and bright discs. If so, do the poststimulus responses of subcortical ON and OFF cells parallel such afterimage asymmetries? To test these hypotheses, we performed psychophysical experiments in humans and single-cell/S-potential recordings in cat dLGN. Psychophysically, we found that bright afterimages elicited by luminance decrements are stronger and last longer than dark afterimages elicited by luminance increments of equal sizes. -
Contact Lenses
Buying Contact Lenses Some common Questions and Answers to help you buy your lenses safely Wearing contact lenses offers many benefits. Following some simple precautions when buying lenses can help to make sure that you don’t put the health and comfort of your eyes at risk. The British Contact Lens Association and General Optical Council have put together some common questions and answers to help you buy your lenses safely 2 Images courtesy of College of Optometrists, General Optical Council and Optician How do I find out about wearing contact lenses? ● If you want to wear contact lenses to correct your eyesight, you must start by consulting an eye care practitioner for a fitting. Only registered optometrists, dispensing opticians with a specialist qualification (contact lens opticians) and medical practitioners can fit contact lenses. Fitting includes discussing your visual and lifestyle requirements, an eye examination to make sure your eyes are healthy and find out if you’re suitable, and measurements of your eyes to ensure the best lens type, fit and vision, before trying lenses. Once you have worn the lenses, you should have the health of your eyes checked again. You will also need to learn how to handle and care for your lenses. Your practitioner will advise you when you should wear the lenses and how often you should replace them. When is the fitting completed? ● Your prescribing practitioner will tell you when the fitting is completed. How long the fitting takes will depend on your lens type and your eye health. Don’t forget that, once fitted, you will need to have regular check-ups to make sure your eyes are healthy and to get the best from your contact lenses. -
Expanding the Phenotypic Spectrum of PAX6 Mutations: from Congenital Cataracts to Nystagmus
G C A T T A C G G C A T genes Article Expanding the Phenotypic Spectrum of PAX6 Mutations: From Congenital Cataracts to Nystagmus Maria Nieves-Moreno 1,* , Susana Noval 1 , Jesus Peralta 1, María Palomares-Bralo 2 , Angela del Pozo 3 , Sixto Garcia-Miñaur 4, Fernando Santos-Simarro 4 and Elena Vallespin 5 1 Department of Ophthalmology, Hospital Universitario La Paz, 28046 Madrid, Spain; [email protected] (S.N.); [email protected] (J.P.) 2 Department of Molecular Developmental Disorders, Medical and Molecular Genetics Institue (INGEMM) IdiPaz, CIBERER, Hospital Universitario La Paz, 28046 Madrid, Spain; [email protected] 3 Department of Bioinformatics, Medical and Molecular Genetics Institue (INGEMM) IdiPaz, CIBERER, Hospital Universitario La Paz, 28046 Madrid, Spain; [email protected] 4 Department of Clinical Genetics, Medical and Molecular Genetics Institue (INGEMM) IdiPaz, CIBERER, Hospital Universitario La Paz, 28046 Madrid, Spain; [email protected] (S.G.-M.); [email protected] (F.S.-S.) 5 Department of Molecular Ophthalmology, Medical and Molecular Genetics Institue (INGEMM) IdiPaz, CIBERER, Hospital Universitario La Paz, 28046 Madrid, Spain; [email protected] * Correspondence: [email protected] Abstract: Background: Congenital aniridia is a complex ocular disorder, usually associated with severe visual impairment, generally caused by mutations on the PAX6 gene. The clinical phenotype of PAX6 mutations is highly variable, making the genotype–phenotype correlations difficult to establish. Methods: we describe the phenotype of eight patients from seven unrelated families Citation: Nieves-Moreno, M.; Noval, with confirmed mutations in PAX6, and very different clinical manifestations. -
Cone Contributions to Signals for Accommodation and the Relationship to Refractive Error
Vision Research 46 (2006) 3079–3089 www.elsevier.com/locate/visres Cone contributions to signals for accommodation and the relationship to refractive error Frances J. Rucker ¤, Philip B. Kruger Schnurmacher Institute for Vision Research, State University of New York, State College of Optometry, 33 West 42nd Street, New York, NY 10036, USA Received 18 February 2005; received in revised form 7 April 2006 Abstract The accommodation response is sensitive to the chromatic properties of the stimulus, a sensitivity presumed to be related to making use of the longitudinal chromatic aberration of the eye to decode the sign of the defocus. Thus, the relative sensitivity to the long- (L) and middle-wavelength (M) cones may inXuence accommodation and may also be related to an individual’s refractive error. Accommodation was measured continuously while subjects viewed a sine wave grating (2.2 c/d) that had diVerent cone contrast ratios. Seven conditions tested loci that form a circle with equal vector length (0.27) at 0, 22.5, 45, 67.5, 90, 120, 145 deg. An eighth condition produced an empty Weld stimulus (CIE (x,y) co-ordinates (0.4554, 0.3835)). Each of the gratings moved at 0.2 Hz sinusoidally between 1.00 D and 3.00 D for 40 s, while the eVects of longitudinal chromatic aberration were neutralized with an achromatizing lens. Both the mean level of accommo- dation and the gain of the accommodative response, to sinusoidal movements of the stimulus, depended on the relative L and M cone sen- sitivity: Individuals more sensitive to L-cone stimulation showed a higher level of accommodation (p D 0.01; F D 12.05; ANOVA) and dynamic gain was higher for gratings with relatively more L-cone contrast. -
Care of the Patient with Accommodative and Vergence Dysfunction
OPTOMETRIC CLINICAL PRACTICE GUIDELINE Care of the Patient with Accommodative and Vergence Dysfunction OPTOMETRY: THE PRIMARY EYE CARE PROFESSION Doctors of optometry are independent primary health care providers who examine, diagnose, treat, and manage diseases and disorders of the visual system, the eye, and associated structures as well as diagnose related systemic conditions. Optometrists provide more than two-thirds of the primary eye care services in the United States. They are more widely distributed geographically than other eye care providers and are readily accessible for the delivery of eye and vision care services. There are approximately 36,000 full-time-equivalent doctors of optometry currently in practice in the United States. Optometrists practice in more than 6,500 communities across the United States, serving as the sole primary eye care providers in more than 3,500 communities. The mission of the profession of optometry is to fulfill the vision and eye care needs of the public through clinical care, research, and education, all of which enhance the quality of life. OPTOMETRIC CLINICAL PRACTICE GUIDELINE CARE OF THE PATIENT WITH ACCOMMODATIVE AND VERGENCE DYSFUNCTION Reference Guide for Clinicians Prepared by the American Optometric Association Consensus Panel on Care of the Patient with Accommodative and Vergence Dysfunction: Jeffrey S. Cooper, M.S., O.D., Principal Author Carole R. Burns, O.D. Susan A. Cotter, O.D. Kent M. Daum, O.D., Ph.D. John R. Griffin, M.S., O.D. Mitchell M. Scheiman, O.D. Revised by: Jeffrey S. Cooper, M.S., O.D. December 2010 Reviewed by the AOA Clinical Guidelines Coordinating Committee: David A.