1 - E-Prints Complutense
... The eye is an optical instrument that projects scenes of the visual world onto the retina. However the human eye is far from being a perfect optical system, and, as a consequence, the images projected on the retina are blurred by ocular aberrations, as well as diffraction and scatte ...
... The eye is an optical instrument that projects scenes of the visual world onto the retina. However the human eye is far from being a perfect optical system, and, as a consequence, the images projected on the retina are blurred by ocular aberrations, as well as diffraction and scatte ...
optic disc abnormalities – diagnosis, evolution and influence on
... Congenital abnormalities of the optic disc are not so rare. The etiology for the most of them is unknown. Visual acuity of affected eye may be minimally or severely affected, depending on the extent of lesion. All of these conditions can be unilateral or bilateral. Children who have unilateral optic ...
... Congenital abnormalities of the optic disc are not so rare. The etiology for the most of them is unknown. Visual acuity of affected eye may be minimally or severely affected, depending on the extent of lesion. All of these conditions can be unilateral or bilateral. Children who have unilateral optic ...
VITREOUS HEMORRHAGE
... limiting membrane of retina posteriorly and laterally, the non-pigmented epithelium of ciliary body laterally and the lens zonular fibers and posterior lens capsule ...
... limiting membrane of retina posteriorly and laterally, the non-pigmented epithelium of ciliary body laterally and the lens zonular fibers and posterior lens capsule ...
Motley
... eyelid. In some cases, the eyelids can be raised with tissues attached to the eyebrows ; the lid is lifted when the eyebrow is raised. Other conditions associated with ptosis are strabismus (improperly aligned eyes), refractive errors, or astigmatism. In most cases ptosis affects visual field but ma ...
... eyelid. In some cases, the eyelids can be raised with tissues attached to the eyebrows ; the lid is lifted when the eyebrow is raised. Other conditions associated with ptosis are strabismus (improperly aligned eyes), refractive errors, or astigmatism. In most cases ptosis affects visual field but ma ...
Wavefront Analysis for Keratoconus
... the RMS error is dependent on the size of the pupil being investigated, and the amount of wavefront RMS error found will increase as the pupil size increases (Figs 3A to C).7 The wavefront RMS error value allows a brief comparison between different eyes. The higher-order RMS error is the vector sum ...
... the RMS error is dependent on the size of the pupil being investigated, and the amount of wavefront RMS error found will increase as the pupil size increases (Figs 3A to C).7 The wavefront RMS error value allows a brief comparison between different eyes. The higher-order RMS error is the vector sum ...
Document
... Congenital abnormalities of the nasolacrimal drainage system are most frequently diagnosed in horses ⬍1 year of age.6 –10 Ocular discharge may be serous or mucopurulent in nature. The nasal puncta is the most common site of atresia, and diagnosis can be confirmed by visual assessment of the nasal fl ...
... Congenital abnormalities of the nasolacrimal drainage system are most frequently diagnosed in horses ⬍1 year of age.6 –10 Ocular discharge may be serous or mucopurulent in nature. The nasal puncta is the most common site of atresia, and diagnosis can be confirmed by visual assessment of the nasal fl ...
Brain Research, 59 (1973) - Center for Neural Science
... penetration one or two small electrolytic lesions (10-20 A for 10-20 sec) were made so that the positions of critical recording points could be more readily identified in the frontal sections that were prepared after each experiment. Receptive field positions were determined by moving small light or ...
... penetration one or two small electrolytic lesions (10-20 A for 10-20 sec) were made so that the positions of critical recording points could be more readily identified in the frontal sections that were prepared after each experiment. Receptive field positions were determined by moving small light or ...
An Incremental Retinal-Defocus Theory of the Development of Myopia
... constant sensitivity to retinal-image contrast, and furthermore that interplexiform neuronal activity leads to a corresponding change in the neuromodulators (Hung and Ciuffreda 2000a, 2000b, 2000c). Such feedback regulation is useful. It precludes the need for a memory mechanism to register and stor ...
... constant sensitivity to retinal-image contrast, and furthermore that interplexiform neuronal activity leads to a corresponding change in the neuromodulators (Hung and Ciuffreda 2000a, 2000b, 2000c). Such feedback regulation is useful. It precludes the need for a memory mechanism to register and stor ...
Turnover of Tear Film Lipid Layer/ Mochizuki et al./ page 1 1
... eye, to avoid the effect of a surfactant as much as possible. The most interesting finding was that the turnover rate of DAF (0.9 ± 0.4 %/min) was approximately 9% that of fluorescein sodium (10.3 ± 3.8 %/min), indicating that the turnover of lipids in tears is much slower than the aqueous flow of t ...
... eye, to avoid the effect of a surfactant as much as possible. The most interesting finding was that the turnover rate of DAF (0.9 ± 0.4 %/min) was approximately 9% that of fluorescein sodium (10.3 ± 3.8 %/min), indicating that the turnover of lipids in tears is much slower than the aqueous flow of t ...
THE HYMENOPTERAN SKYLIGHT COMPASS
... being intensity, spectral composition, degree of polarization and direction of polarization). To acquire the necessary input data the insect could perform four measurements: either simultaneously by using four different receptors, or successively by employing only one receptor. The successive method ...
... being intensity, spectral composition, degree of polarization and direction of polarization). To acquire the necessary input data the insect could perform four measurements: either simultaneously by using four different receptors, or successively by employing only one receptor. The successive method ...
Identification of ciliary epithelial-specific genes using subtractive
... The ciliary epithelium of the ciliary body is derived from the anterior rim of the developing optic cup. Several recent studies have found that developmental abnormalities in this tissue can underlie congenital glaucoma. However, there is little known about the development of the ciliary epithelium. ...
... The ciliary epithelium of the ciliary body is derived from the anterior rim of the developing optic cup. Several recent studies have found that developmental abnormalities in this tissue can underlie congenital glaucoma. However, there is little known about the development of the ciliary epithelium. ...
Advances in understanding the molecular basis of the first steps in
... Color vision provides the primary human sensory perception of our environment and its understanding requires input from a variety of scientific fields (Bowmaker, 2008). It is initiated when photons of light penetrate the eye to reach the retina causing ‘excitation and photoisomerization’ of the 11-cis ...
... Color vision provides the primary human sensory perception of our environment and its understanding requires input from a variety of scientific fields (Bowmaker, 2008). It is initiated when photons of light penetrate the eye to reach the retina causing ‘excitation and photoisomerization’ of the 11-cis ...
PREVALENCE OF MYOPIC SHIFTS AMONG PATIENTS SEEKING
... two different types of cataract. The Blue Mountains Eye Study reported a mean myopic change of – 0.96 diopters after 10 years of follow up in subjects with nuclear cataract grades 4 or 5 at baseline19. Although the present study was not prospective, a similar average myopic shift of – 0.91 diopters ...
... two different types of cataract. The Blue Mountains Eye Study reported a mean myopic change of – 0.96 diopters after 10 years of follow up in subjects with nuclear cataract grades 4 or 5 at baseline19. Although the present study was not prospective, a similar average myopic shift of – 0.91 diopters ...
Oral Lutein Supplementation Enhances Macular Pigment Density
... enhance contrast sensitivity and may reduce the risk of progression to advanced age-related macular degeneration (AMD). Furthermore, omega-3 long-chain polyunsaturated fatty acids (PUFA) might further reduce this risk. However, controversy exists regarding whether PUFA may reduce the bioavailability ...
... enhance contrast sensitivity and may reduce the risk of progression to advanced age-related macular degeneration (AMD). Furthermore, omega-3 long-chain polyunsaturated fatty acids (PUFA) might further reduce this risk. However, controversy exists regarding whether PUFA may reduce the bioavailability ...
Normal Thin Cornea CCT = 493 µm
... Detects two applanation events correlated with the air pulse pressure (INWARD p1 and OUTWARD - p2)poe ...
... Detects two applanation events correlated with the air pulse pressure (INWARD p1 and OUTWARD - p2)poe ...
Retinal Vein Occlusions
... Confluent hemorrhages are the most prominent ophthalmoscopic feature of an acute ischemic central retinal vein occlusion These hemorrhages occur in a wide variety of shapes and sizes; they are usually concentrated in the posterior pole, but may be seen throughout the retina. Hemorrhages in the super ...
... Confluent hemorrhages are the most prominent ophthalmoscopic feature of an acute ischemic central retinal vein occlusion These hemorrhages occur in a wide variety of shapes and sizes; they are usually concentrated in the posterior pole, but may be seen throughout the retina. Hemorrhages in the super ...
curriculum vitae - Department of Ophthalmology
... Fellowship Director And Unit Training Director We have four fellows and one junior resident. Two fellows work with me at any one given time. One of these fellows is split between GOSH and King’s College Hospital, London. Royal College of Ophthalmologists Tutor NSCAG Ophthalmologist The National Spec ...
... Fellowship Director And Unit Training Director We have four fellows and one junior resident. Two fellows work with me at any one given time. One of these fellows is split between GOSH and King’s College Hospital, London. Royal College of Ophthalmologists Tutor NSCAG Ophthalmologist The National Spec ...
IOSR Journal of Dental and Medical Sciences (IOSR-JDMS)
... A conjunctival cyst is a thin-walled sac or vesicle that contains fluid. This vesicle may develop either on or under the conjunctiva. Cyst wall consists of several layers of non-keratinised lining epithelium and connective tissue. 80% of the entire cystic lesions of conjunctiva are inclusion cysts. ...
... A conjunctival cyst is a thin-walled sac or vesicle that contains fluid. This vesicle may develop either on or under the conjunctiva. Cyst wall consists of several layers of non-keratinised lining epithelium and connective tissue. 80% of the entire cystic lesions of conjunctiva are inclusion cysts. ...
Complications of Ophthalmic Surgery in the Horse
... Lacerations of the eyelids should be repaired promptly to inhibit formation of cicatricial eyelid deformities, prevent a reduction in eyelid blinking function, and reduce the chance of infections and exposure-induced damage to the cornea (1). Corneal ulcerations, globe perforation, uveitis, periorbi ...
... Lacerations of the eyelids should be repaired promptly to inhibit formation of cicatricial eyelid deformities, prevent a reduction in eyelid blinking function, and reduce the chance of infections and exposure-induced damage to the cornea (1). Corneal ulcerations, globe perforation, uveitis, periorbi ...
Evaluation of Femtosecond Laser Clear Corneal Incision
... (unpublished data) was performed to choose the optimal CCI design by comparing two-plane and threeplane corneal incisions. We found that, for a 2.75-mm size, a three-plane CCI had the optimal characteristics in terms of length and self-sealing. To preliminarily evaluate the effect of femtosecond las ...
... (unpublished data) was performed to choose the optimal CCI design by comparing two-plane and threeplane corneal incisions. We found that, for a 2.75-mm size, a three-plane CCI had the optimal characteristics in terms of length and self-sealing. To preliminarily evaluate the effect of femtosecond las ...
Chapter 47
... Azithromycin and clarithromycin if the patient has a severe allergy to penicillin ...
... Azithromycin and clarithromycin if the patient has a severe allergy to penicillin ...
Human eye
The human eye is an organ that reacts to light and has several purposes. As a sense organ, the mammalian eye allows vision. Rod and cone cells in the retina allow conscious light perception and vision including color differentiation and the perception of depth. The human eye can distinguish about 10 million colors.Similar to the eyes of other mammals, the human eye's non-image-forming photosensitive ganglion cells in the retina receive light signals which affect adjustment of the size of the pupil, regulation and suppression of the hormone melatonin and entrainment of the body clock.