- Wiley Online Library
... corneal area being flattened for myopic correction. Clinical examination was otherwise normal. Conclusions: Despite being initially reported in Asian patients from Hong Kong, a pigmented ring related to orthokeratology treatment is also present in Caucasian patients, reducing the potential role of a ...
... corneal area being flattened for myopic correction. Clinical examination was otherwise normal. Conclusions: Despite being initially reported in Asian patients from Hong Kong, a pigmented ring related to orthokeratology treatment is also present in Caucasian patients, reducing the potential role of a ...
RE: Keratoconus and Contact Lenses
... Keratoconus results in grossly distorted vision similar to looking through a windshield while driving in a rainstorm without using windshield wipers. Keratoconus is characterized by thinning and protrusion of the central cornea, resulting in a ghosting and glare, photophobia, halos around lights, de ...
... Keratoconus results in grossly distorted vision similar to looking through a windshield while driving in a rainstorm without using windshield wipers. Keratoconus is characterized by thinning and protrusion of the central cornea, resulting in a ghosting and glare, photophobia, halos around lights, de ...
the regulation of eye growth and refractive state: an experimental
... their vitreous chambers; growth stopped in eyes recovering from myopia and continued in eyes recovering from hyperopia. Because both hyperopic and myopic eyes were already larger than normal controls, the difference in growth indicates that refractive error, rather than eye size per se, guides the e ...
... their vitreous chambers; growth stopped in eyes recovering from myopia and continued in eyes recovering from hyperopia. Because both hyperopic and myopic eyes were already larger than normal controls, the difference in growth indicates that refractive error, rather than eye size per se, guides the e ...
Keratoconus and Contact Lenses - National Keratoconus Foundation
... Spectacles cannot achieve these results. The lenses in a pair of glasses are too far away from the optical surface of the cornea to create the smooth refractive surface necessary to translate the image clearly to the back of the eye and therefore to the brain. These therapeutic contact lenses are no ...
... Spectacles cannot achieve these results. The lenses in a pair of glasses are too far away from the optical surface of the cornea to create the smooth refractive surface necessary to translate the image clearly to the back of the eye and therefore to the brain. These therapeutic contact lenses are no ...
Early Clinical Outcomes of Wavefront
... than 6.0 diopters (D) of refractive astigmatism, corrected distance visual acuity (CDVA) of 20/32 or better in both eyes, and patient age of at least 18 years. Exclusion criteria for treatment were concurrent medications or medical conditions that could impair healing, active ophthalmic disease, abn ...
... than 6.0 diopters (D) of refractive astigmatism, corrected distance visual acuity (CDVA) of 20/32 or better in both eyes, and patient age of at least 18 years. Exclusion criteria for treatment were concurrent medications or medical conditions that could impair healing, active ophthalmic disease, abn ...
Phakic IOL - Augenklinik Teufen
... • A group of outpatient surgical procedures used to alter how your eye focuses light rays on the retina, thereby improving vision and reducing dependence on glasses and contact lenses. • In most cases, refractive surgery affects the shape of your cornea to redirect how light is focused onto the reti ...
... • A group of outpatient surgical procedures used to alter how your eye focuses light rays on the retina, thereby improving vision and reducing dependence on glasses and contact lenses. • In most cases, refractive surgery affects the shape of your cornea to redirect how light is focused onto the reti ...
Novel Approaches to Treating Presbyopia
... glimpse of the global influence of this ocular condition.1 Already in 2005, presbyopia was estimated to impact 1.04 billion people worldwide, with 410 million people classified as visually impaired due to lack of adequate near corrections.2 The projected magnitude of this phenomenon underlies the at ...
... glimpse of the global influence of this ocular condition.1 Already in 2005, presbyopia was estimated to impact 1.04 billion people worldwide, with 410 million people classified as visually impaired due to lack of adequate near corrections.2 The projected magnitude of this phenomenon underlies the at ...
Corneal Refractive Surgery - Whitewater Eye Centers, LLC
... increased dramatically thanks to the work of John Marshall, Ph.D., of King’s College, University of London. His work validated many of the aforementioned concerns. Using X-ray diffraction technology, Dr. Marshall and colleagues demonstrated that the anterior third (150μm) of the central stroma, as w ...
... increased dramatically thanks to the work of John Marshall, Ph.D., of King’s College, University of London. His work validated many of the aforementioned concerns. Using X-ray diffraction technology, Dr. Marshall and colleagues demonstrated that the anterior third (150μm) of the central stroma, as w ...
Session 161 Posterior segment mechanisms and functions
... Twin Research and Genetic Epidemiology, King’s College London, London, United Kingdom. Purpose: Genetic associations with myopia have been identified, but mechanisms by which they might confer susceptibility are not known. The strongest association (rs524952) is near a gene coding for a protein form ...
... Twin Research and Genetic Epidemiology, King’s College London, London, United Kingdom. Purpose: Genetic associations with myopia have been identified, but mechanisms by which they might confer susceptibility are not known. The strongest association (rs524952) is near a gene coding for a protein form ...
Public Health Poster Presentation Day brochure.
... Methods: 15 normally binocular young adults monocularly viewed four 30 minarcwide vertical bars drawn on a monitor 40cm from the eyes. All bars appeared simultaneously for 0.5 sec about a 5 minarc white fixation spot. Two of the bars (above or below fixation) loomed toward (or away) from the subject ...
... Methods: 15 normally binocular young adults monocularly viewed four 30 minarcwide vertical bars drawn on a monitor 40cm from the eyes. All bars appeared simultaneously for 0.5 sec about a 5 minarc white fixation spot. Two of the bars (above or below fixation) loomed toward (or away) from the subject ...
A morphological analysis of experimental myopia in young
... therefore, the nasal retina approaches the lens and cornea more closely than the temporal retina. The trabecular meshwork and Schlemm's canal are better developed temporally, and the scleral ossicles are larger. The anterior curvature of the lens was often found to be concave in the hemisected eye, ...
... therefore, the nasal retina approaches the lens and cornea more closely than the temporal retina. The trabecular meshwork and Schlemm's canal are better developed temporally, and the scleral ossicles are larger. The anterior curvature of the lens was often found to be concave in the hemisected eye, ...
Accelerated Refractive Performance
... for 12 months. Accountability at 3 months was 93.8%, at 6 months was 91.9%, and at 12 months was 93.9%. The studies found that of the 844 eyes eligible for the uncorrected visual acuity (UCVA) analysis of effectiveness at the 3-month stability time point, 98.0% were corrected to 20/40 or better, and ...
... for 12 months. Accountability at 3 months was 93.8%, at 6 months was 91.9%, and at 12 months was 93.9%. The studies found that of the 844 eyes eligible for the uncorrected visual acuity (UCVA) analysis of effectiveness at the 3-month stability time point, 98.0% were corrected to 20/40 or better, and ...
Optometric Co-Management of Refractive Surgery
... malfunction, greatly reducing the risk for intraoperative complications. Decentered ablation, resulting from patient’s loss of fixation on specified target, from head movement, or from improper fixation by laser eye tracker. Symptoms: irregular astigmatism, high-order aberations, loss of BCVA. ...
... malfunction, greatly reducing the risk for intraoperative complications. Decentered ablation, resulting from patient’s loss of fixation on specified target, from head movement, or from improper fixation by laser eye tracker. Symptoms: irregular astigmatism, high-order aberations, loss of BCVA. ...
Anterior chamber iris-fixated intraocular lens placement
... refractive error, are at increased risk of RD14-16) has been found to be similar for patients receiving either an anterior or a posterior chamber IOL. This suggests that neither the placement nor the presence of an ACIOL greatly increases the risk of RD, if at all17. In the cases described here, giv ...
... refractive error, are at increased risk of RD14-16) has been found to be similar for patients receiving either an anterior or a posterior chamber IOL. This suggests that neither the placement nor the presence of an ACIOL greatly increases the risk of RD, if at all17. In the cases described here, giv ...
Improving Vision Naturally
... appears as a large black circle which varies in size as the iris contracts and expands to modulate the amount of light entering the eye. Behind the iris the choroid forms a muscular appendage known as the ciliary body. The ciliary body is where some of the fluid of the eye is produced. Behind the pu ...
... appears as a large black circle which varies in size as the iris contracts and expands to modulate the amount of light entering the eye. Behind the iris the choroid forms a muscular appendage known as the ciliary body. The ciliary body is where some of the fluid of the eye is produced. Behind the pu ...
Four corneal presbyopia corrections
... SETTING: Institute for Refractive and Ophthalmic Surgery, Zurich, Switzerland. METHODS: The optical consequences of 4 corneal shapesdglobal optimum (GO) for curvature and asphericity, central steep island (CSI), decentered steep island (DSI), and centered steep annulus (CSA)dfor presbyopia correctio ...
... SETTING: Institute for Refractive and Ophthalmic Surgery, Zurich, Switzerland. METHODS: The optical consequences of 4 corneal shapesdglobal optimum (GO) for curvature and asphericity, central steep island (CSI), decentered steep island (DSI), and centered steep annulus (CSA)dfor presbyopia correctio ...
A Prospective, Randomized, Contralateral Eye Comparison of
... corneal ectasia.1,2 Furthermore, patients with thin corneas can be at risk for corneal ectasia postoperatively, because the structural stability of the cornea can be compromised due to inadequate residual stromal bed thickness. Patients with steep corneal curvatures or suspicious topographies are at ...
... corneal ectasia.1,2 Furthermore, patients with thin corneas can be at risk for corneal ectasia postoperatively, because the structural stability of the cornea can be compromised due to inadequate residual stromal bed thickness. Patients with steep corneal curvatures or suspicious topographies are at ...
Orthokeratology lens related infections Kelvin Ho
... population since the usage in more affluent economies[32]. The estimated myopia in urban Chinese children at the age of 18 years would be up to 2.0 dioptres higher than their parents, and their refractive errors at the age of 11 would already be similar to their parents. This suggests a strong envir ...
... population since the usage in more affluent economies[32]. The estimated myopia in urban Chinese children at the age of 18 years would be up to 2.0 dioptres higher than their parents, and their refractive errors at the age of 11 would already be similar to their parents. This suggests a strong envir ...
Operative Correction of Ocular Aberrations to Improve Visual Acuity
... human eye (consisting of cornea and lens). By compensating for aberrations by means of adaptive optics, Liang and coworkers resolved fine gratings (55 c/deg) that were invisible under normal viewing conditions.5 The mean increase in wavefront error by 40% is a disappointing result on first glance, h ...
... human eye (consisting of cornea and lens). By compensating for aberrations by means of adaptive optics, Liang and coworkers resolved fine gratings (55 c/deg) that were invisible under normal viewing conditions.5 The mean increase in wavefront error by 40% is a disappointing result on first glance, h ...
August 2009 - Retina New Zealand
... currently tested that impose myopia, rather than hyperopia, in the periphery in the hope that they reduce myopia progression. The major problems are distortions induced by such lenses well known to people wearing reading glasses. The exciting idea of inhibiting axial eye growth by drugs, applied as ...
... currently tested that impose myopia, rather than hyperopia, in the periphery in the hope that they reduce myopia progression. The major problems are distortions induced by such lenses well known to people wearing reading glasses. The exciting idea of inhibiting axial eye growth by drugs, applied as ...
Bilateral Eviscerations-Retinopathy of Prematurity
... The less well developed the retinal vasculature the more severe is the ROP Oxygen and angiogenic growth factors Oxygen tension causes capillary obliteration and vascular endothelial death in the immature retina Severity of ROP is related to the duration and amount of oxygen exposure Subseque ...
... The less well developed the retinal vasculature the more severe is the ROP Oxygen and angiogenic growth factors Oxygen tension causes capillary obliteration and vascular endothelial death in the immature retina Severity of ROP is related to the duration and amount of oxygen exposure Subseque ...
RE: Keratoconus and Contact Lenses
... Spectacles cannot achieve these results. The lenses in a pair of glasses are too far away from the optical surface of the cornea to create the smooth refractive surface necessary to translate the image clearly to the back of the eye and therefore to the brain. These therapeutic contact lenses are no ...
... Spectacles cannot achieve these results. The lenses in a pair of glasses are too far away from the optical surface of the cornea to create the smooth refractive surface necessary to translate the image clearly to the back of the eye and therefore to the brain. These therapeutic contact lenses are no ...
Q-factor customized ablation profile for the correction of myopic
... strategies appear to be clinically equivalent. An important result is the only minor decrease in low-contrast visual acuity in both groups, which is remarkable because after conventional photorefractive keratectomy and LASIK, low-contrast visual acuity shows a significant reduction.3,22 Although not ...
... strategies appear to be clinically equivalent. An important result is the only minor decrease in low-contrast visual acuity in both groups, which is remarkable because after conventional photorefractive keratectomy and LASIK, low-contrast visual acuity shows a significant reduction.3,22 Although not ...
EHLERS-DANLOS SYNDROME - The Role of Collagen in the Eye
... The human eye is primarily made up of connective tissue. The sclera (the tissue that makes up the white of the eye) is all collagen and represents 80% of the eye. The cornea (clear tissue at the front of the eye) is mostly collagen as well.4 Since EDS is a collagen defect and the eye is primarily ma ...
... The human eye is primarily made up of connective tissue. The sclera (the tissue that makes up the white of the eye) is all collagen and represents 80% of the eye. The cornea (clear tissue at the front of the eye) is mostly collagen as well.4 Since EDS is a collagen defect and the eye is primarily ma ...
Jul - Sep 05 - NHG Eye Institute
... In-Situ Keratomileusis (LASIK) to a new level. LASIK is currently the most common method of correcting myopia and astigmatism worldwide. During wavefront-guided LASIK, patients have their corneas mapped prior to the operation. However, lying down may cause their eyes to cyclotort (rotate), misaligni ...
... In-Situ Keratomileusis (LASIK) to a new level. LASIK is currently the most common method of correcting myopia and astigmatism worldwide. During wavefront-guided LASIK, patients have their corneas mapped prior to the operation. However, lying down may cause their eyes to cyclotort (rotate), misaligni ...