Optical Quality and Tear Film Analysis after Various Lubricating Eye
... and the effect of higher-order aberrations on the light entering the eye. In addition, the HD analyzer can also be used to determine an eye’s depth of focus and to assess the optical quality of the tear film in 0.5 s intervals, which allows the physician to see real-time effects of tear film evapora ...
... and the effect of higher-order aberrations on the light entering the eye. In addition, the HD analyzer can also be used to determine an eye’s depth of focus and to assess the optical quality of the tear film in 0.5 s intervals, which allows the physician to see real-time effects of tear film evapora ...
Diabetic Retinopathy
... retinal blood vessels. These blood vessels may develop balloon-like swelling called microaneurysms. Microaneurysms and other areas of abnormal retinal blood vessels may leak fluid, causing the retina to swell or bleed. This may lead to vision loss. Leakage in the center of the retina (macula), known ...
... retinal blood vessels. These blood vessels may develop balloon-like swelling called microaneurysms. Microaneurysms and other areas of abnormal retinal blood vessels may leak fluid, causing the retina to swell or bleed. This may lead to vision loss. Leakage in the center of the retina (macula), known ...
Part 2 FRCOphth Written Sample MCQs
... A 63 year old man presented with an intraocular pressure (IOP) of 23mmHg. He is currently using topical G latanoprost and timolol once daily to both eyes. He now has an IOP of 18mmHg in both eyes with corneal thickness of 500 microns. The optic discs show a cup disc ratio of 0.6 right eye with no fi ...
... A 63 year old man presented with an intraocular pressure (IOP) of 23mmHg. He is currently using topical G latanoprost and timolol once daily to both eyes. He now has an IOP of 18mmHg in both eyes with corneal thickness of 500 microns. The optic discs show a cup disc ratio of 0.6 right eye with no fi ...
Function of the Dimorphic Eyes in the Midwater Squid Histioteuthis
... retinal intensity of larger objects viewed by the eye is independent of the eye size. A large eye with a greater number of retinal cells, however, has a distinct advantage over a small eye in increasing sensitivity through retinal summation. An all-rod vertebrate eye can increase sensitivity about o ...
... retinal intensity of larger objects viewed by the eye is independent of the eye size. A large eye with a greater number of retinal cells, however, has a distinct advantage over a small eye in increasing sensitivity through retinal summation. An all-rod vertebrate eye can increase sensitivity about o ...
Primary Care Referral Guidelines - Royal Victorian Eye and Ear
... A patient whose condition is identified from referral details as causing some pain, dysfunction or disability, but which is not likely to deteriorate quickly or become an emergency Patients whose condition is identified from referral details as being unlikely to deteriorate quickly and does not have ...
... A patient whose condition is identified from referral details as causing some pain, dysfunction or disability, but which is not likely to deteriorate quickly or become an emergency Patients whose condition is identified from referral details as being unlikely to deteriorate quickly and does not have ...
Segmental Scleral Buckling
... Nondrainage also avoids some of the more severe complications seen in encircling buckles with drainage. Additionally, radial scleral buckles often obviate the need to change a patient’s spectacle prescription postoperatively.8 Segmental buckles are known to be safe in the long term (>15 years of fol ...
... Nondrainage also avoids some of the more severe complications seen in encircling buckles with drainage. Additionally, radial scleral buckles often obviate the need to change a patient’s spectacle prescription postoperatively.8 Segmental buckles are known to be safe in the long term (>15 years of fol ...
Ultrasound biomicroscopy findings in fireworks
... base avulsion, five cases of anterior chamber deepening, and two cases of posterior bowing of iris. (Tables 1 and 2) Of the 42 cases who were planned to be examined by UBM, seven were not compliant with follow up and three could not cooperate for the exam. As we did not intend to provide definite es ...
... base avulsion, five cases of anterior chamber deepening, and two cases of posterior bowing of iris. (Tables 1 and 2) Of the 42 cases who were planned to be examined by UBM, seven were not compliant with follow up and three could not cooperate for the exam. As we did not intend to provide definite es ...
Neovascular Glaucoma - MM Joshi Eye Institute
... Diabetic retinopathy: one third of patients with NVI have Diabetic retinopathy. More common in aphakic eyes, and pseduophakic eye with posterior capsule opening. Central Retinal Vein Occlusion: The most common cause for NVI.The overall incidence of NVI in all CRVO cases is 12% to 30%. NVI also more ...
... Diabetic retinopathy: one third of patients with NVI have Diabetic retinopathy. More common in aphakic eyes, and pseduophakic eye with posterior capsule opening. Central Retinal Vein Occlusion: The most common cause for NVI.The overall incidence of NVI in all CRVO cases is 12% to 30%. NVI also more ...
Viktor`s Notes * Retinal Disorders
... central retinal artery (first intraorbital branch of ophthalmic artery) enters optic nerve 8-15 mm behind globe – direct supply to retina. short posterior ciliary arteries (branch more distally from ophthalmic artery) supply choroid; anatomical variant (≈ 14%) - cilioretinal artery (branch from ...
... central retinal artery (first intraorbital branch of ophthalmic artery) enters optic nerve 8-15 mm behind globe – direct supply to retina. short posterior ciliary arteries (branch more distally from ophthalmic artery) supply choroid; anatomical variant (≈ 14%) - cilioretinal artery (branch from ...
Anatomy Physiology of the
... millimeter in thickness. Along with the eyelids and sclera, the cornea protects the inside of the eye from germs, dust, and other dangers and is the first focusing surface that light encounters as it travels through the eye. In fact, the cornea, together with the tear film, account for about 65%–80% ...
... millimeter in thickness. Along with the eyelids and sclera, the cornea protects the inside of the eye from germs, dust, and other dangers and is the first focusing surface that light encounters as it travels through the eye. In fact, the cornea, together with the tear film, account for about 65%–80% ...
Endogenous endophthalmitis due to Roseomonas mucosa
... mucosa has been reported to cause systemic infections in immunosuppressed individuals, ocular infection due to Roseomonas has been rarely reported in literature previously. Findings: A 74-year-old diabetic was diagnosed to have Klebsiella urinary tract infection and septicemia following which he dev ...
... mucosa has been reported to cause systemic infections in immunosuppressed individuals, ocular infection due to Roseomonas has been rarely reported in literature previously. Findings: A 74-year-old diabetic was diagnosed to have Klebsiella urinary tract infection and septicemia following which he dev ...
Review of Central and Branch Retinal Vein Occlusions
... foveal avascular zone. Patients gained on average one Snellen line compared to untreated patients. This older studywas accomplished prior to the advent of anti-VEGF therapy, and provided the basis of laser treatment with the recommendation to wait 3 to 6 months, and consider laser photocoagulation t ...
... foveal avascular zone. Patients gained on average one Snellen line compared to untreated patients. This older studywas accomplished prior to the advent of anti-VEGF therapy, and provided the basis of laser treatment with the recommendation to wait 3 to 6 months, and consider laser photocoagulation t ...
Accommodation demand and deprivation in kitten ocular
... investigated in four groups of kittens (total n = 29). Group 1 consisted of five normal kittens; group 2 (nine kittens) had monocular radial keratotomy to induce relative hypermetropia and more accommodation demand as well as to impart interocular refractive differences (anisometropia); group 3 (eig ...
... investigated in four groups of kittens (total n = 29). Group 1 consisted of five normal kittens; group 2 (nine kittens) had monocular radial keratotomy to induce relative hypermetropia and more accommodation demand as well as to impart interocular refractive differences (anisometropia); group 3 (eig ...
Perfluorocarbon Liquid-Assisted External Drainage in the
... variable-sized areas of retinal pigment epithelial detachment. Fluorescein angiography was our major diagnostic tool owing to previous management which had masked the initial presentation and bullous subretinal fluid which precluded an ophthalmoscopic examination. The manifestation in the contralate ...
... variable-sized areas of retinal pigment epithelial detachment. Fluorescein angiography was our major diagnostic tool owing to previous management which had masked the initial presentation and bullous subretinal fluid which precluded an ophthalmoscopic examination. The manifestation in the contralate ...
Accommodation demand and deprivation in kitten ocular
... lens focal length differences in these eyes were approximately the same as those of the radial keratotomy group. In all three treated groups, the interocular differences were greater for the anterior focal length, especially in the fourth group in which the ratio of differences anterior to posterior ...
... lens focal length differences in these eyes were approximately the same as those of the radial keratotomy group. In all three treated groups, the interocular differences were greater for the anterior focal length, especially in the fourth group in which the ratio of differences anterior to posterior ...
Laser Lights
... light bulb that covers a much wider spectrum of visible light. Also, because most lasers only emit one color of light, the light is known as being coherent, meaning that they hold together over a long distance. That’s why you can see laser lights so far away. Today there are many different types of ...
... light bulb that covers a much wider spectrum of visible light. Also, because most lasers only emit one color of light, the light is known as being coherent, meaning that they hold together over a long distance. That’s why you can see laser lights so far away. Today there are many different types of ...
Evaluation of Retinal Pigment Epithelial Hamartoma Using Oct – A
... with attached gliotic retina and internal limiting membrane (ILM). The RPE cells showed fibrous metaplasia. CSHRPE is an uncommon presumed congenital lesion that has characteristic ophthalmoscopic, fluroescein angiographic and OCT features. CSHRPE appears ophthalmoscopically as a small localized, el ...
... with attached gliotic retina and internal limiting membrane (ILM). The RPE cells showed fibrous metaplasia. CSHRPE is an uncommon presumed congenital lesion that has characteristic ophthalmoscopic, fluroescein angiographic and OCT features. CSHRPE appears ophthalmoscopically as a small localized, el ...
Incontinentia pigmenti (Bloch-Sulzberger syndrome)
... change in the pigment epithelium and choriocapillaris with sharp edges was present (Fig. 7). In the temporal periphery another circular alteration of the pigment epithelium and choriocapillaris was visible (Fig. 8). This zone also showed mild anomalies of the retinal vascularisation. In the left eye ...
... change in the pigment epithelium and choriocapillaris with sharp edges was present (Fig. 7). In the temporal periphery another circular alteration of the pigment epithelium and choriocapillaris was visible (Fig. 8). This zone also showed mild anomalies of the retinal vascularisation. In the left eye ...
Naturally occurring vitreous chamber-based myopia in the
... Keratometer power, anterior and posterior lens radii of curvature, lens thickness, and vitreous chamber depth did not display age-related changes between 6 months and 7 years of age in these dogs (JP < 0.06). The absence of age-related trends in lens thickness and vitreous chamber depth in mature do ...
... Keratometer power, anterior and posterior lens radii of curvature, lens thickness, and vitreous chamber depth did not display age-related changes between 6 months and 7 years of age in these dogs (JP < 0.06). The absence of age-related trends in lens thickness and vitreous chamber depth in mature do ...
偏振、干涉和繞射(Optical).
... reflection will expose the eyes. 3. Only experienced personnel should be permitted to operate the laser. Never leave an operable laser unattended if there is a chance that an unauthorized person may attempt to use it. A key switch should be used. A warning light or buzzer should indicate when the la ...
... reflection will expose the eyes. 3. Only experienced personnel should be permitted to operate the laser. Never leave an operable laser unattended if there is a chance that an unauthorized person may attempt to use it. A key switch should be used. A warning light or buzzer should indicate when the la ...
Rapid Diffusion of Hydrogen Protects the Retina: Administration to
... One day after I/R injury, a remarkable increase in the number of apoptotic cells (TUNEL-positive cells) was observed in both the inner and the outer nuclear layers of vehicle-treated retinas (Fig. 3A); however, the administration of H2-loaded eye drops resulted in a significant decrease (about 77%, ...
... One day after I/R injury, a remarkable increase in the number of apoptotic cells (TUNEL-positive cells) was observed in both the inner and the outer nuclear layers of vehicle-treated retinas (Fig. 3A); however, the administration of H2-loaded eye drops resulted in a significant decrease (about 77%, ...
NON-TRAUMATIC RETINAL DETACHMENT IN A 60-YEAR
... retinal detachment in myopic eyes is related to the prevalence of the disease precursors in such eyes.6 Nigerian Journal of Medical Imaging and Radiation Therapy ...
... retinal detachment in myopic eyes is related to the prevalence of the disease precursors in such eyes.6 Nigerian Journal of Medical Imaging and Radiation Therapy ...
Central retinal vein occlusion concomitant with dengue fever
... posterior pole which was treated with panretinal photocoagulation. There was no new vessels on the iris or angle noted. The macular edema improved drastically and was monitored with OCT imaging. Unfortunately, her vision did not improve. Her best corrected visual acuity of right eye is 20/400 and le ...
... posterior pole which was treated with panretinal photocoagulation. There was no new vessels on the iris or angle noted. The macular edema improved drastically and was monitored with OCT imaging. Unfortunately, her vision did not improve. Her best corrected visual acuity of right eye is 20/400 and le ...
ADVANCED SURFACE ABLATION (ASA)
... To better understand ASA and how the excimer laser can be used to correct vision problems resulting from refractive error, a short review of how the eye works may be helpful. Refractive errors (nearsightedness or myopia, farsightedness or hyperopia, and astigmatism) generally result from an abnormal ...
... To better understand ASA and how the excimer laser can be used to correct vision problems resulting from refractive error, a short review of how the eye works may be helpful. Refractive errors (nearsightedness or myopia, farsightedness or hyperopia, and astigmatism) generally result from an abnormal ...
of EYE
... – Changes shape to focus images on retina – Soft & flexible in the young; harder as we age – Cataracts form in this structure (BUMMER!) – Approximately +18.00D to +21.00D of power ...
... – Changes shape to focus images on retina – Soft & flexible in the young; harder as we age – Cataracts form in this structure (BUMMER!) – Approximately +18.00D to +21.00D of power ...
Floater
Floaters are deposits of various size, shape, consistency, refractive index, and motility within the eye's vitreous humour, which is normally transparent. At a young age, the vitreous istransparent, but as one ages, imperfections gradually develop. The common type of floater, which is present in most persons' eyes, is due to degenerative changes of the vitreous humour. The perception of floaters is known as myodesopsia, or less commonly as myodaeopsia, myiodeopsia, myiodesopsia. They are also called Muscae volitantes (Latin: ""flying flies""), or mouches volantes (from the French). Floaters are visible because of the shadows they cast on the retina or refraction of the light that passes through them, and can appear alone or together with several others in one's visual field. They may appear as spots, threads, or fragments of cobwebs, which float slowly before the observer's eyes. As these objects exist within the eye itself, they are not optical illusions but are entoptic phenomena.