... Keratoconus Definition and Diagnosis Keratoconus is a non-inflammatory, progressive ectasia of the cornea. It is characterized by progressive thinning and steepening of the central cornea into a cone-like shape. As the cornea steepens and thins, the patient experiences a decrease in vision, which ca ...
Accommodation after an implantable collamer lens implantation in
... Abstract: Purpose: The purpose of the current study was to investigate the pathogenesis of visual fatigue in patients after implantable collamer lens (ICL) implantation based on an evaluation of accommodation function. Methods: Thirty patients (12 males and 18 females) with high myopia underwent a t ...
... Abstract: Purpose: The purpose of the current study was to investigate the pathogenesis of visual fatigue in patients after implantable collamer lens (ICL) implantation based on an evaluation of accommodation function. Methods: Thirty patients (12 males and 18 females) with high myopia underwent a t ...
LASIK Report - Clear Choice Custom LASIK Center
... hyperopia, or farsightedness, have more difficulty seeing near objects as clearly as distant objects. Astigmatism is a distortion of the image on the retina caused by irregularities in the cornea or lens of the eye. It is not unusual to have combinations of myopia and astigmatism or hyperopia and as ...
... hyperopia, or farsightedness, have more difficulty seeing near objects as clearly as distant objects. Astigmatism is a distortion of the image on the retina caused by irregularities in the cornea or lens of the eye. It is not unusual to have combinations of myopia and astigmatism or hyperopia and as ...
Femto-LASIK: Blade-Free, Flap-Free, Excimer
... desired ; and finally (d ) 30 to 50 degrees in cordal lengthfrom the surface of the cornea, with a depth up to the edge of the anterior part of the lenticule. The entire procedure takes less than 30 seconds, practically independent of the refractive error to be corrected. The spherocylindrical shape ...
... desired ; and finally (d ) 30 to 50 degrees in cordal lengthfrom the surface of the cornea, with a depth up to the edge of the anterior part of the lenticule. The entire procedure takes less than 30 seconds, practically independent of the refractive error to be corrected. The spherocylindrical shape ...
Moving the Retina: Choroidal Modulation of Refractive State
... The chick eye is able to change its refractive state by as much as 7 D by pushing the retina forward or pulling it back; this is effected by changes in the thickness of the choroid, the vascular tissue behind the retina and pigment epithelium. Chick eyes first made myopic by wearing diffusers and th ...
... The chick eye is able to change its refractive state by as much as 7 D by pushing the retina forward or pulling it back; this is effected by changes in the thickness of the choroid, the vascular tissue behind the retina and pigment epithelium. Chick eyes first made myopic by wearing diffusers and th ...
Full Text of PDF
... space including an edge of the corneal flap, and parenchymal edema in the flap and bed (Figures 1A and 1B). Based on these findings, a diagnosis of DLK at stage 2 was made. Instillation of eye drops of fluorometholone (0.1% Flumetholon) once an hour was prescribed. Considering the possibility of bac ...
... space including an edge of the corneal flap, and parenchymal edema in the flap and bed (Figures 1A and 1B). Based on these findings, a diagnosis of DLK at stage 2 was made. Instillation of eye drops of fluorometholone (0.1% Flumetholon) once an hour was prescribed. Considering the possibility of bac ...
The Eye - CamTools
... The bulk of the lens, the cortex (newer fibers) and the nucleus (older fibers), is cellular. These specialized cells are the “lens fibers” and they are vastly elongated lens epithelial cells that have lost most of the normal cell contents (nucleus and organelles). The lens is also 30% protein by mas ...
... The bulk of the lens, the cortex (newer fibers) and the nucleus (older fibers), is cellular. These specialized cells are the “lens fibers” and they are vastly elongated lens epithelial cells that have lost most of the normal cell contents (nucleus and organelles). The lens is also 30% protein by mas ...
The Eye
... A. Occurs when light rays are not refracted properly and the image focuses behind the retina B. Difficulty seeing things close up C. Vision is corrected by the use of convex lenses Myopia or nearsightedness A. Occurs when light rays are refracted too sharply B. Difficulty seeing things far off C. Vi ...
... A. Occurs when light rays are not refracted properly and the image focuses behind the retina B. Difficulty seeing things close up C. Vision is corrected by the use of convex lenses Myopia or nearsightedness A. Occurs when light rays are refracted too sharply B. Difficulty seeing things far off C. Vi ...
vision-threatening complications of phakic iol surgery
... Administration (FDA) for the treatment of patients with moderate to high myopia between the ranges of -5 diopters to -20 diopters, with up to 2.5 diopters of astigmatism. Surgical implantation of a phakic intraocular lens (phakic implant surgery) is one of a number of alternatives for correcting nea ...
... Administration (FDA) for the treatment of patients with moderate to high myopia between the ranges of -5 diopters to -20 diopters, with up to 2.5 diopters of astigmatism. Surgical implantation of a phakic intraocular lens (phakic implant surgery) is one of a number of alternatives for correcting nea ...
QQQQ TB and CHEMO MG effect on EYES
... desires to see more symmetrically between the two eyes. Intacs can be removed, but patient reports that his surgeon had recommended against the explantation procedure for him. Indications for Intacs explantation include poor visual outcome and visual disturbance, such as seeing glare and halo, after ...
... desires to see more symmetrically between the two eyes. Intacs can be removed, but patient reports that his surgeon had recommended against the explantation procedure for him. Indications for Intacs explantation include poor visual outcome and visual disturbance, such as seeing glare and halo, after ...
DRI OCT-1 Abstracts DRI OCT-1
... and myopic conus in eyes with high myopia. DESIGN: Prospective, observational case series. PARTICIPANTS: We evaluated 198 eyes of 119 patients with pathologic myopia (spherical equivalent >-8 diopters [D]). We also evaluated 32 eyes of 32 subjects with emmetropia (refractive error ≤±3 D) as controls ...
... and myopic conus in eyes with high myopia. DESIGN: Prospective, observational case series. PARTICIPANTS: We evaluated 198 eyes of 119 patients with pathologic myopia (spherical equivalent >-8 diopters [D]). We also evaluated 32 eyes of 32 subjects with emmetropia (refractive error ≤±3 D) as controls ...
Q-1 what is cornea? Ans- cornea is a thin membrane through which
... Ans – the ability of the eye lens to adjust its focal length is called accommodation. Q.14 what do you mean by least distance of distinct vision? Ans – the minimum distance, at which objects can be seen most distinctly without strain, is called the least distance of distinct vision, or near point of ...
... Ans – the ability of the eye lens to adjust its focal length is called accommodation. Q.14 what do you mean by least distance of distinct vision? Ans – the minimum distance, at which objects can be seen most distinctly without strain, is called the least distance of distinct vision, or near point of ...
Correlation between Axial Length and Retinal Nerve Fiber Layer
... Conclusion; In myopic patients the RNFL thickness decreases with increasing axial length. ...
... Conclusion; In myopic patients the RNFL thickness decreases with increasing axial length. ...
Phakic Intraocular Lenses
... Endothelial cell loss has been identified as a potential risk factor for younger patients: guidelines on the minimum age for recipients of phakic IOLS will have to be established because there is concern about the cumulative impact of endothelial cell loss on young recipients, who could have the len ...
... Endothelial cell loss has been identified as a potential risk factor for younger patients: guidelines on the minimum age for recipients of phakic IOLS will have to be established because there is concern about the cumulative impact of endothelial cell loss on young recipients, who could have the len ...
Lasik Surgery: Outcomes, Volume and Resources
... The criterion for safety used here is the percentage of all patients who had uneventful recovery. Surgeries with flap-related complications and post-operative corneal ulcers are considered eventful surgeries. The Council for Refractive Surgery Quality Assurance (CRSQA), which certifies refractive su ...
... The criterion for safety used here is the percentage of all patients who had uneventful recovery. Surgeries with flap-related complications and post-operative corneal ulcers are considered eventful surgeries. The Council for Refractive Surgery Quality Assurance (CRSQA), which certifies refractive su ...
C hanging lives through better vision…
... up details like reading. This is part of the natural aging process. Presbyopia is the hardening of your natural lens. The result is reduced elasticity, thus the lack of ability for the lens to focus properly. Unfortunately, this is not a refractive disorder and cannot be corrected by Laser Vision Co ...
... up details like reading. This is part of the natural aging process. Presbyopia is the hardening of your natural lens. The result is reduced elasticity, thus the lack of ability for the lens to focus properly. Unfortunately, this is not a refractive disorder and cannot be corrected by Laser Vision Co ...
Brochure - London Eye Centre
... In 1985, London Place Eye Centre (as we were then known) opened its doors for the first time. As one of the first private medical clinics in British Columbia, London Eye Centre originally offered cataract, refractive and cosmetic surgery to its patients. We were the first eye clinic in BC to be accr ...
... In 1985, London Place Eye Centre (as we were then known) opened its doors for the first time. As one of the first private medical clinics in British Columbia, London Eye Centre originally offered cataract, refractive and cosmetic surgery to its patients. We were the first eye clinic in BC to be accr ...
Recurrent corneal epithelial erosion syndrome
... Previous refractive surgery (particularly PRK) Symptoms Unilateral sharp pain, typically sudden onset on waking and opening eyes; may also awake patient in middle of night Feeling as if eyelid is stuck to eyeball Lacrimation Photophobia Blurred vision May recur over weeks, months or years Signs Epit ...
... Previous refractive surgery (particularly PRK) Symptoms Unilateral sharp pain, typically sudden onset on waking and opening eyes; may also awake patient in middle of night Feeling as if eyelid is stuck to eyeball Lacrimation Photophobia Blurred vision May recur over weeks, months or years Signs Epit ...
7 Optics
... iv. It is reduced in the eye by the aplanatic nature of the cornea v. It is reduced in the eye by the curved nature of the retina ...
... iv. It is reduced in the eye by the aplanatic nature of the cornea v. It is reduced in the eye by the curved nature of the retina ...
excimer laser assisted in-situ kxratomileusis for
... interface haze, lifted flap or indeed any complications related to the flap. One issue that we feel is of particular importance is the issue of centration and the importance of properly centering the procedure relative to the central axis. In the series reported by Dausch et al”, decentration of the ...
... interface haze, lifted flap or indeed any complications related to the flap. One issue that we feel is of particular importance is the issue of centration and the importance of properly centering the procedure relative to the central axis. In the series reported by Dausch et al”, decentration of the ...
Miscellaneous corneal conditions (Imp for UGs)
... • Timely injecs of Vit A & control of malnutrition. ...
... • Timely injecs of Vit A & control of malnutrition. ...
PDF - touchOPHTHALMOLOGY
... shown that the vertical sidecut of a flap is responsible for almost all of the change in strain due to LASIK flap creation.41 It has also been shown that the anterior corneal stroma is the strongest part of the stroma,42–45 due to the greater interconnectivity of collagen fibers in the anterior stro ...
... shown that the vertical sidecut of a flap is responsible for almost all of the change in strain due to LASIK flap creation.41 It has also been shown that the anterior corneal stroma is the strongest part of the stroma,42–45 due to the greater interconnectivity of collagen fibers in the anterior stro ...
The effects of choroidal or ciliary nerve transection on myopic
... the increased CBF in these birds, which is likely a centrally mediated bilateral response to the increased light on the retina due to the pupil dilation caused by ciliary nerve transection.4-7 Although these studies showed that accommodation might not have been necessary for growth to a normal size ...
... the increased CBF in these birds, which is likely a centrally mediated bilateral response to the increased light on the retina due to the pupil dilation caused by ciliary nerve transection.4-7 Although these studies showed that accommodation might not have been necessary for growth to a normal size ...
the eyes in marfan syndrome
... What are the considerations for vision problems in children with Marfan syndrome? There are many causes of vision problems in children with Marfan syndrome. Often, the eyeball is large or too long, which keeps light rays from focusing on the retina and causes myopia or nearsightedness. In other case ...
... What are the considerations for vision problems in children with Marfan syndrome? There are many causes of vision problems in children with Marfan syndrome. Often, the eyeball is large or too long, which keeps light rays from focusing on the retina and causes myopia or nearsightedness. In other case ...
INFORMED CONSENT FOR REFRACTIVE LENS EXCHANGE (RLE
... excimer laser to remove tissue from the exposed tissue on the corneal surface. Both procedures have been found to be quite successful and relatively safe for the correction of moderate and high myopia up to about –12.00 D. Above 12 diopters, LASIK and PRK are less accurate and cause a high incidence ...
... excimer laser to remove tissue from the exposed tissue on the corneal surface. Both procedures have been found to be quite successful and relatively safe for the correction of moderate and high myopia up to about –12.00 D. Above 12 diopters, LASIK and PRK are less accurate and cause a high incidence ...