Pupillary responses in amblyopia - British Journal of Ophthalmology
... An afferent or relative afferent pupillary defect has been reported to be present in between 9% and 93% of amblyopes.'' The main criticism of these findings is that poor fixation in the amblyopic eye may result in the light stimulus striking different retinal areas.7 Routine orthoptic examination do ...
... An afferent or relative afferent pupillary defect has been reported to be present in between 9% and 93% of amblyopes.'' The main criticism of these findings is that poor fixation in the amblyopic eye may result in the light stimulus striking different retinal areas.7 Routine orthoptic examination do ...
Session 325 Clinical Imaging
... Results: In S1, using UWFI we found that there is a significantly higher prevalence of hard drusen in the peipheral retina only in AD patients at baseline (p<0.05). Drusen numbers increased significantly in AD patients by the 2-year follow-up (p<0.05). In S2, using OCT, disease duration at baseline ...
... Results: In S1, using UWFI we found that there is a significantly higher prevalence of hard drusen in the peipheral retina only in AD patients at baseline (p<0.05). Drusen numbers increased significantly in AD patients by the 2-year follow-up (p<0.05). In S2, using OCT, disease duration at baseline ...
Combined Glaucoma and Cataract Surgery
... implant versus conventional filtration surgery, the outcomes are comparable when it is used under the scleral flap, after application of MMC, in lieu of removing tissue. Thus, this is also likely true for its use in combined procedures5 despite the results of a study by Rivier et al, using the initi ...
... implant versus conventional filtration surgery, the outcomes are comparable when it is used under the scleral flap, after application of MMC, in lieu of removing tissue. Thus, this is also likely true for its use in combined procedures5 despite the results of a study by Rivier et al, using the initi ...
Saccadic Compensation for Smooth Eye and Head Movements
... ability to keep track of the position of world-fixed objects while we move. In the case of vision, this phenomenon is called spatial constancy and has been studied in head-restraint conditions. During head-restrained smooth pursuit, it has been shown that the saccadic system has access to extraretin ...
... ability to keep track of the position of world-fixed objects while we move. In the case of vision, this phenomenon is called spatial constancy and has been studied in head-restraint conditions. During head-restrained smooth pursuit, it has been shown that the saccadic system has access to extraretin ...
Diagnosing Early Keratoconus
... epithelial thickness across the central 6 mm of the cornea. The Clinical Importance of ETM In healthy eyes, epithelial thickness is universal (approximately 53 µm in all eyes), regardless of age and other factors. A rare variation in that thickness could indicate a problem such as early keratoconus. ...
... epithelial thickness across the central 6 mm of the cornea. The Clinical Importance of ETM In healthy eyes, epithelial thickness is universal (approximately 53 µm in all eyes), regardless of age and other factors. A rare variation in that thickness could indicate a problem such as early keratoconus. ...
dislocated Posterior chamber intraocular Lens Management
... the eye and the first half is pulled through, there is a loop of polypropylene suture holding the IOL, and the 2 ends are outside of the eye next to each other. This polypropylene suture is left untied, or tied with a single throw, until the second polypropylene suture is finished, securing the othe ...
... the eye and the first half is pulled through, there is a loop of polypropylene suture holding the IOL, and the 2 ends are outside of the eye next to each other. This polypropylene suture is left untied, or tied with a single throw, until the second polypropylene suture is finished, securing the othe ...
Appendix C
... Such topical anesthesia is used in millions of cataract surgeries annually. It is also used during routine eye exams to anesthetize the corneal surface before measuring intraocular pressure for glaucoma screening. NICEATM recently evaluated how pretreatment with tetracaine hydrochloride (0.5% w/v) a ...
... Such topical anesthesia is used in millions of cataract surgeries annually. It is also used during routine eye exams to anesthetize the corneal surface before measuring intraocular pressure for glaucoma screening. NICEATM recently evaluated how pretreatment with tetracaine hydrochloride (0.5% w/v) a ...
Demographic and Clinical Profile of Patients who Underwent
... study to cover 5 years from January 2010 to December 2014. The estimated study population for this study was 1,500 individuals. Inclusion criteria were the following: age above 18 years, wearing eyeglasses or contact lens for distance or near tasks, expressed their desire to undergo refractive surge ...
... study to cover 5 years from January 2010 to December 2014. The estimated study population for this study was 1,500 individuals. Inclusion criteria were the following: age above 18 years, wearing eyeglasses or contact lens for distance or near tasks, expressed their desire to undergo refractive surge ...
Eligibility of a Child with Visual Impairment, Including Blindness
... Visual Acuity of = or < than 20/70 In The Better Eye After Correction “Better eye after correction” through prescription lenses ...
... Visual Acuity of = or < than 20/70 In The Better Eye After Correction “Better eye after correction” through prescription lenses ...
Preferred retinal loci and macular scotoma characteristics
... subjects with the 1° cross were combined for analysis. In all subjects, the major axis length and area of the PRLs were significantly larger with the primary position of gaze than with the secondary positions of gaze. However, all the inexperienced subjects had larger fixation areas than the experie ...
... subjects with the 1° cross were combined for analysis. In all subjects, the major axis length and area of the PRLs were significantly larger with the primary position of gaze than with the secondary positions of gaze. However, all the inexperienced subjects had larger fixation areas than the experie ...
Disconjugate adaptation to long-standing, large-amplitude
... 1.25°of vergence change during monocular viewing). Finally, the waveform of the adapted (to spectacles) intrasaccadic vergence change with monocular viewing was similar to the waveform of the unadapted intrasaccadic vergence change during binocular relaxations between targets that required a combine ...
... 1.25°of vergence change during monocular viewing). Finally, the waveform of the adapted (to spectacles) intrasaccadic vergence change with monocular viewing was similar to the waveform of the unadapted intrasaccadic vergence change during binocular relaxations between targets that required a combine ...
MICROSCOPE
... The microscope (micron = small, scope = application) is an instrument that is generally used to study the very small organisms (microorganisms) or particles which are not visible by the naked eyes. Anton Van Leeuwenhoeck (1674) made the microscope for the first time. This microscope has practically ...
... The microscope (micron = small, scope = application) is an instrument that is generally used to study the very small organisms (microorganisms) or particles which are not visible by the naked eyes. Anton Van Leeuwenhoeck (1674) made the microscope for the first time. This microscope has practically ...
Cancer Association of South Africa (CANSA) Fact Sheet
... Light Sensitivity. The lack of pigment in the retina and iris generally makes people with albinism sensitive to bright light and glare. One may notice a child squint or cover their eyes in environments with bright light. Tinted glasses and sunglasses outside can help a child most effectively use the ...
... Light Sensitivity. The lack of pigment in the retina and iris generally makes people with albinism sensitive to bright light and glare. One may notice a child squint or cover their eyes in environments with bright light. Tinted glasses and sunglasses outside can help a child most effectively use the ...
Effects of Learning on Smooth Pursuit During Transient
... has demonstrated learning in the pursuit system, but it is unclear whether these effects are the result of changes in visual or motor processing. The ability to maintain smooth pursuit during the transient disappearance of a visual target provides a way to assess pursuit properties in the absence of ...
... has demonstrated learning in the pursuit system, but it is unclear whether these effects are the result of changes in visual or motor processing. The ability to maintain smooth pursuit during the transient disappearance of a visual target provides a way to assess pursuit properties in the absence of ...
What is the best fixation target? The effect of target shape on stability
... Our survey of fixation target shapes showed that experiments that require stable fixation commonly use circle and cross shapes, as well as their combinations, as fixation target shapes (Table 1). Thus, we decided to use circles and crosses and their combinations as target shapes in our experiment. Fig. ...
... Our survey of fixation target shapes showed that experiments that require stable fixation commonly use circle and cross shapes, as well as their combinations, as fixation target shapes (Table 1). Thus, we decided to use circles and crosses and their combinations as target shapes in our experiment. Fig. ...
Pupil Dilation CLINICAL GUIDELINE
... • Instillation of one drop of 2.5% phenylephrine followed (5 minutes later) by one drop of tropicamide 0.5% or 1.0% is likely to give a greater dilation than either drug used alone – maximising effect on both the iris sphincter muscle and the iris dilator muscle. This can be useful for patients whos ...
... • Instillation of one drop of 2.5% phenylephrine followed (5 minutes later) by one drop of tropicamide 0.5% or 1.0% is likely to give a greater dilation than either drug used alone – maximising effect on both the iris sphincter muscle and the iris dilator muscle. This can be useful for patients whos ...
II. simulation result
... in one eye like as Fig. 1. As another advantage of this system, it is possible that visual fatigue due to conflict between monocular accommodation and binocular convergence in the stereoscopic display can be eliminated because of a possibility of accommodation effect like as Fig. 1(b). However, it i ...
... in one eye like as Fig. 1. As another advantage of this system, it is possible that visual fatigue due to conflict between monocular accommodation and binocular convergence in the stereoscopic display can be eliminated because of a possibility of accommodation effect like as Fig. 1(b). However, it i ...
Roles of cell-extrinsic growth factors in vertebrate eye pattern
... from individual progenitor cells can assume a variety of cell fates [12–16]. Furthermore, cell fate decisions can be made during or after the last mitotic division, since two daughter cells of a given progenitor often adopt distinct cell fates. The multipotency of retinal progenitor cells throughout ...
... from individual progenitor cells can assume a variety of cell fates [12–16]. Furthermore, cell fate decisions can be made during or after the last mitotic division, since two daughter cells of a given progenitor often adopt distinct cell fates. The multipotency of retinal progenitor cells throughout ...
Macular Pigment and Lutein Supplementation in Retinitis
... vision to supplementation of lutein. METHODS. Patients with retinitis pigmentosa (RP) or Usher syndrome and normal subjects had MP optical density profiles measured with heterochromatic flicker photometry. Serum carotenoids, visual acuity, foveal sensitivity, and retinal thickness (by optical cohere ...
... vision to supplementation of lutein. METHODS. Patients with retinitis pigmentosa (RP) or Usher syndrome and normal subjects had MP optical density profiles measured with heterochromatic flicker photometry. Serum carotenoids, visual acuity, foveal sensitivity, and retinal thickness (by optical cohere ...
TonoVet DNA Magazine
... pathology in the eye. Is the pressure above normal or below normal? Are the pressures in the two eyes nearly equal? Is the pressure higher or lower than one would expect with the appearance of the eye? Only with this information can we correctly assess an ophthalmic condition and formulate a plan fo ...
... pathology in the eye. Is the pressure above normal or below normal? Are the pressures in the two eyes nearly equal? Is the pressure higher or lower than one would expect with the appearance of the eye? Only with this information can we correctly assess an ophthalmic condition and formulate a plan fo ...
Wide Field Of View Varifocal Near-Eye Display Using See
... we will analyze daperture , which is defined both in the vertical and the horizontal axis. In our designs, the aperture shapes are chosen as either circular or elliptical. Adult humans have a mean interpupillary distance (IPD) of 63 mm, and their IPDs can range between 50 and 75 mm [8]. Thus, horizo ...
... we will analyze daperture , which is defined both in the vertical and the horizontal axis. In our designs, the aperture shapes are chosen as either circular or elliptical. Adult humans have a mean interpupillary distance (IPD) of 63 mm, and their IPDs can range between 50 and 75 mm [8]. Thus, horizo ...
MCQs 3.25MB 2017-03
... e. intentional tremor 3. The following are true about botulinum toxin: a. cannot be used under general anaesthesia b. can only be used for the horizontal recti c. ptosis is one of the complications when used for blepharospasm d. will develop antibodies in blood e. the onset of action takes 24 hours ...
... e. intentional tremor 3. The following are true about botulinum toxin: a. cannot be used under general anaesthesia b. can only be used for the horizontal recti c. ptosis is one of the complications when used for blepharospasm d. will develop antibodies in blood e. the onset of action takes 24 hours ...
Leading 2nd version.PM
... have existed as the stable ferric ion. As a trace amount of the inert ferric ion diffused into the rats’ ONL, it was reduced by ascorbic acid to ferrous ion. The auto-oxidation of a ferrous ion to ferric ion released a single electron to form the highly toxic superoxide. A continuous turnover of fer ...
... have existed as the stable ferric ion. As a trace amount of the inert ferric ion diffused into the rats’ ONL, it was reduced by ascorbic acid to ferrous ion. The auto-oxidation of a ferrous ion to ferric ion released a single electron to form the highly toxic superoxide. A continuous turnover of fer ...
Read Article - Cataract & Refractive Surgery Today
... supplement on advanced IOL technology that ran in Cataract & Refractive Surgery Today in April. It is a great time to be a refractive cataract surgeon. We are fortunate to live in an era of advanced surgical care where we can offer our patients effective solutions that significantly improve their qu ...
... supplement on advanced IOL technology that ran in Cataract & Refractive Surgery Today in April. It is a great time to be a refractive cataract surgeon. We are fortunate to live in an era of advanced surgical care where we can offer our patients effective solutions that significantly improve their qu ...
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.