Aref OCT 2011 - EYE-PIX
... 4. Courville CB, Smolek MK, Klyce SD. Contribution of the ocular surface to visual optics. Exp Eye Res. 2004;78:417-425. 5. Korb DR, Baron DF, Herman JP, et al. Tear film lipid layer thickness as a function of blinking. Cornea. 1994;13:354-359. 6. Mengher LS, Bron AJ, Tonge SR, Gilbert D ...
... 4. Courville CB, Smolek MK, Klyce SD. Contribution of the ocular surface to visual optics. Exp Eye Res. 2004;78:417-425. 5. Korb DR, Baron DF, Herman JP, et al. Tear film lipid layer thickness as a function of blinking. Cornea. 1994;13:354-359. 6. Mengher LS, Bron AJ, Tonge SR, Gilbert D ...
Development of a Surgical Instrument Prototype to Perform a More
... which will help prevent the lens from becoming off-centered. The lens might shrink due to what is known as capsular phimosis. This is where fibers expand causing the diameter of the incision to shrink. The lens becoming off-center is known as late in-the-bag decentration. If there is not proper over ...
... which will help prevent the lens from becoming off-centered. The lens might shrink due to what is known as capsular phimosis. This is where fibers expand causing the diameter of the incision to shrink. The lens becoming off-center is known as late in-the-bag decentration. If there is not proper over ...
Chemical Ocular Burns: A Case Review
... Acidic chemicals are categorized by having a low pH and readily dissociate into hydrogen ions and anions within the anterior surface. They are less common than alkali burns and are usually less damaging. The hydrogen ions produced by chemical dissociation cause a change in pH within the ocular plane ...
... Acidic chemicals are categorized by having a low pH and readily dissociate into hydrogen ions and anions within the anterior surface. They are less common than alkali burns and are usually less damaging. The hydrogen ions produced by chemical dissociation cause a change in pH within the ocular plane ...
Visual function in regenerating teleost retina following
... Patch extirpation The conjunctiva was removed from the eye, and the eye pivoted ventrally in its socket, revealing the dorsal sclera. A small incision was made with a microblade, parallel and posterior to the limbus at approximately the 12 o’clock position. Trans-scleral incisions were made with an ...
... Patch extirpation The conjunctiva was removed from the eye, and the eye pivoted ventrally in its socket, revealing the dorsal sclera. A small incision was made with a microblade, parallel and posterior to the limbus at approximately the 12 o’clock position. Trans-scleral incisions were made with an ...
Ophthalmic Imaging - an Overview and Current State of Art: Part I
... through the optics of the fundus camera to form an image of the fundus at the film plane. Fundus cameras are often described by their optical angle of view. An angle of 30 degrees is considered the normal angle of view and creates a film image 2.5 times life size. Fixed-angle cameras usually offer t ...
... through the optics of the fundus camera to form an image of the fundus at the film plane. Fundus cameras are often described by their optical angle of view. An angle of 30 degrees is considered the normal angle of view and creates a film image 2.5 times life size. Fixed-angle cameras usually offer t ...
BOLD fMRI Response of Early Visual Areas to Perceived Contrast in
... Contrast detection thresholds are dependent on the “noise” present in the visual system (e.g., Graham 1989). That is, neural firing rates (integrated over some region) must exceed some signal-to-noise ratio threshold in order for a contrast pattern to be detected by the observer. In the case of ambl ...
... Contrast detection thresholds are dependent on the “noise” present in the visual system (e.g., Graham 1989). That is, neural firing rates (integrated over some region) must exceed some signal-to-noise ratio threshold in order for a contrast pattern to be detected by the observer. In the case of ambl ...
DISTINGUISHING A VISUAL IMPAIRMENT VERSUS A VISUAL
... 3. Significant vision loss, including blindness, places a developing child at risk for delays in some areas of development. There are several relevant factors discussed in current literature, such as the nature and extent of exposure and experience, type and severity of vision loss, and the presenc ...
... 3. Significant vision loss, including blindness, places a developing child at risk for delays in some areas of development. There are several relevant factors discussed in current literature, such as the nature and extent of exposure and experience, type and severity of vision loss, and the presenc ...
TECNIS® toric 1-piece aspheric ioL
... presence of radial tears known or suspected at the time of surgery, situations in which the integrity of the circular tear cannot be confirmed by direct visualization, cataract extraction by techniques other than phacoemulsification or liquefaction, situations where the need for a large capsulotomy ...
... presence of radial tears known or suspected at the time of surgery, situations in which the integrity of the circular tear cannot be confirmed by direct visualization, cataract extraction by techniques other than phacoemulsification or liquefaction, situations where the need for a large capsulotomy ...
The Effects of Smoking on Anterior Segment Parameters, Retinal
... that impaired glucose tolerance, diabetes, obesity, and current smoking were associated with an increase in corneal thickness.8 In our study, we evaluated the effects of smoking on some of the anterior segment parameters including corneal thickness. However, no significant difference was found betwe ...
... that impaired glucose tolerance, diabetes, obesity, and current smoking were associated with an increase in corneal thickness.8 In our study, we evaluated the effects of smoking on some of the anterior segment parameters including corneal thickness. However, no significant difference was found betwe ...
RESEARCH UNITS, CENTRES AND INSTITUTES Annual Report
... about contact lens wear and the risk of losing their sight by not being scrupulous about hygiene. 5. Dr Shuan Dai, Senior Honorary Clinical Lecturer and Paediatric Ophthalmologist, was interviewed by the Herald about the $121,000 Optical Coherence Tomography (OCT) eye scanner which has been purchase ...
... about contact lens wear and the risk of losing their sight by not being scrupulous about hygiene. 5. Dr Shuan Dai, Senior Honorary Clinical Lecturer and Paediatric Ophthalmologist, was interviewed by the Herald about the $121,000 Optical Coherence Tomography (OCT) eye scanner which has been purchase ...
Adaptive Optics - Delhi Journal of Ophthalmology
... that the sensitivity of cones were highest at the fovea and decreased as the distance from the fovea increased. Thus they concluded that the sensitivity correlated with cone packing density.9 Retinal dystrophies- Wolfing et al studied the cone directionality, sensitivity and density in patients of a ...
... that the sensitivity of cones were highest at the fovea and decreased as the distance from the fovea increased. Thus they concluded that the sensitivity correlated with cone packing density.9 Retinal dystrophies- Wolfing et al studied the cone directionality, sensitivity and density in patients of a ...
2006S Bio153: Lab Exercise 1 Basic Microscopy Microscopes are
... more apart. Magnification which enlarges an image beyond the resolving power of the microscope is useless and is called empty magnification. The maximum useful magnification for a bright field light microscope is 1,000X. Contrast is the difference in the darkness or color of the structures being exa ...
... more apart. Magnification which enlarges an image beyond the resolving power of the microscope is useless and is called empty magnification. The maximum useful magnification for a bright field light microscope is 1,000X. Contrast is the difference in the darkness or color of the structures being exa ...
Urrets-Zavalia syndrome after deep anterior lamellar keratoplasty
... first postoperative night, in spite of the therapy with mannitol and carbonic anhydrase inhibitor. Glaukomflecken in his lens are “the smoking gun” of acute glaucoma. The location of the patches of iris atrophy seems to correspond to the position where the air bubble exerted its pressure on the iris ...
... first postoperative night, in spite of the therapy with mannitol and carbonic anhydrase inhibitor. Glaukomflecken in his lens are “the smoking gun” of acute glaucoma. The location of the patches of iris atrophy seems to correspond to the position where the air bubble exerted its pressure on the iris ...
Cataract and natural lens replacement (NLR
... When we are young, our eyes can focus at all distances, from very distant objects to very near objects (like an auto-focus camera). This ability to focus weakens throughout life. From about the age of 40, this loss of near focus begins to affect our ability to read and see close-up things clearly. T ...
... When we are young, our eyes can focus at all distances, from very distant objects to very near objects (like an auto-focus camera). This ability to focus weakens throughout life. From about the age of 40, this loss of near focus begins to affect our ability to read and see close-up things clearly. T ...
Differentiating Exophthalmos, Buphthalmos
... What are the results of a retropulsion test? In a retropulsion test, two fingers are used to gently push on the globe through the upper eyelid. With buphthalmos, the eye may feel hard but will sink readily into the orbit. With exophthalmos, resistance to the retropulsion results from presence of a r ...
... What are the results of a retropulsion test? In a retropulsion test, two fingers are used to gently push on the globe through the upper eyelid. With buphthalmos, the eye may feel hard but will sink readily into the orbit. With exophthalmos, resistance to the retropulsion results from presence of a r ...
Ocular Eligibility Criteria - Jaeb Center for Health Research
... non-central DME? The Coordinating Center will provide site an OCT grid with the threshold values for reference Site personnel will enter the thickness value of each subfield directly into the study website for eligibility confirmation Computer algorithm will determine if eyes meet protocol cri ...
... non-central DME? The Coordinating Center will provide site an OCT grid with the threshold values for reference Site personnel will enter the thickness value of each subfield directly into the study website for eligibility confirmation Computer algorithm will determine if eyes meet protocol cri ...
A New Safety Concern for Glaucoma Treatment - Laboratoire
... (BAK C14) chlorides. BAK is a cationic surfactant and tensioactive compound, acting as a detergent for the lipid layer of the tear film as well as for the lipids of cell plasma membranes. It is reputed to increase bioavailability or penetration of active compounds and can be used as a penetration en ...
... (BAK C14) chlorides. BAK is a cationic surfactant and tensioactive compound, acting as a detergent for the lipid layer of the tear film as well as for the lipids of cell plasma membranes. It is reputed to increase bioavailability or penetration of active compounds and can be used as a penetration en ...
Glaucoma Handout
... Treatment - same as POAG. As in pigmentary glaucoma, ALT appears to work better for these patients. Angle Closure Glaucoma Prevalence - less common that POAG, affects approximately half a million people in US Risk Factors - hyperopia, Asian descent, age, family history, acute attacks may be precipit ...
... Treatment - same as POAG. As in pigmentary glaucoma, ALT appears to work better for these patients. Angle Closure Glaucoma Prevalence - less common that POAG, affects approximately half a million people in US Risk Factors - hyperopia, Asian descent, age, family history, acute attacks may be precipit ...
THE WILMER EYE INSTITUTE
... overcome these challenges; however, additional research is needed to perfect both the artificial cornea and the technique for transplantation. In contrast, Dr. Solomon’s work engages the other end of the age scale, in addressing the needs of those who suffer from age-related macular degeneration (AM ...
... overcome these challenges; however, additional research is needed to perfect both the artificial cornea and the technique for transplantation. In contrast, Dr. Solomon’s work engages the other end of the age scale, in addressing the needs of those who suffer from age-related macular degeneration (AM ...
Instructions and Authorization Form
... Please complete this page and the Authorization for Release of Health Information [click for the link]. Requests that are incomplete will not be honored, and may be returned. Write “N/A” if sections are not applicable. If in agreement with the terms on those forms, fill in the name of the patient’s ...
... Please complete this page and the Authorization for Release of Health Information [click for the link]. Requests that are incomplete will not be honored, and may be returned. Write “N/A” if sections are not applicable. If in agreement with the terms on those forms, fill in the name of the patient’s ...
Sensitivity and specificity of an eye movement tracking
... performed while a subject watches television or a video moving inside an aperture with a set trajectory for 220 s at a fixed distance from a viewing monitor. The position of each pupil is recorded over time elapsed as the video travels on its time course, enabling detection of impaired ability to ro ...
... performed while a subject watches television or a video moving inside an aperture with a set trajectory for 220 s at a fixed distance from a viewing monitor. The position of each pupil is recorded over time elapsed as the video travels on its time course, enabling detection of impaired ability to ro ...
Extraction of` ocular artefacts from EEG using independent
... eye activity, rather than proportions of the resulting EOG signals. The source waveforms are calculated from the EEG signal, together with topographic estimations of the propagation of eye activity throughout the head. This method results in considerable eye artefact suppression, but contains some b ...
... eye activity, rather than proportions of the resulting EOG signals. The source waveforms are calculated from the EEG signal, together with topographic estimations of the propagation of eye activity throughout the head. This method results in considerable eye artefact suppression, but contains some b ...
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.