Care of the Patient with Amblyopia
... Strabismic amblyopia is most commonly associated with an early onset (<6-8 years of age) of constant unilateral strabismus. Due to the absence of bifoveal fixation, the two eyes receive different visual images, causing confusion and diplopia. To eliminate these problems, the visual system actively i ...
... Strabismic amblyopia is most commonly associated with an early onset (<6-8 years of age) of constant unilateral strabismus. Due to the absence of bifoveal fixation, the two eyes receive different visual images, causing confusion and diplopia. To eliminate these problems, the visual system actively i ...
Glaucoma: what should the general practitioner know?
... Angle closure glaucoma Primary angle closure glaucoma (ACG) is caused by appositional or synechial closure of the anterior chamber angle, due to a number of mechanisms.9 This is a sightthreatening emergency, involving painful loss of vision, due to sudden and total closure of angle. It is probably t ...
... Angle closure glaucoma Primary angle closure glaucoma (ACG) is caused by appositional or synechial closure of the anterior chamber angle, due to a number of mechanisms.9 This is a sightthreatening emergency, involving painful loss of vision, due to sudden and total closure of angle. It is probably t ...
IOSR Journal of Dental and Medical Sciences (IOSR-JDMS)
... The use of toric IOLs to correct corneal astigmatism is sometimes complicated by rotation of the IOL in the capsular bag. [9] Rotation occurs in the early postoperative period, before the anterior and posterior leaves of the capsule fuse. The presence of long axial length which translates to large c ...
... The use of toric IOLs to correct corneal astigmatism is sometimes complicated by rotation of the IOL in the capsular bag. [9] Rotation occurs in the early postoperative period, before the anterior and posterior leaves of the capsule fuse. The presence of long axial length which translates to large c ...
Guidelines on Laser Radiation
... to the retina. For photochemical injury (exposure durations greater than 10 s) the total retinal radiant exposure determines the effect. The injury threshold does not depend on the retinal spot size. However, if the angular subtense of the retinal spot is small as compared to the angular extent of t ...
... to the retina. For photochemical injury (exposure durations greater than 10 s) the total retinal radiant exposure determines the effect. The injury threshold does not depend on the retinal spot size. However, if the angular subtense of the retinal spot is small as compared to the angular extent of t ...
Amblyopia and binocular vision
... Amblyopia is diminished vision that results from inadequate visual experience during the first years of life. Typically, amblyopia is clinically defined as reduced visual acuity accompanied by one or more known amblyogenic factors, such as strabismus, anisometropia, high refractive error, and cataract ...
... Amblyopia is diminished vision that results from inadequate visual experience during the first years of life. Typically, amblyopia is clinically defined as reduced visual acuity accompanied by one or more known amblyogenic factors, such as strabismus, anisometropia, high refractive error, and cataract ...
Autofluorescence from the Outer Retina and Subretinal Space
... There are two reasons that may explain this difference. First, the confocal nature of the imaging by scanning laser ophthalmoscopic approaches rejects fluorescence from planes that are not conjugate with those targeted. In cases where there is a neurosensory detachment and the focus is directed at t ...
... There are two reasons that may explain this difference. First, the confocal nature of the imaging by scanning laser ophthalmoscopic approaches rejects fluorescence from planes that are not conjugate with those targeted. In cases where there is a neurosensory detachment and the focus is directed at t ...
Effects of stimulation of the ocular sympathetic nerves on IOP
... rebounds. The smaller amplitude of this pressure rise, in comparison with the magnitude of the equivalent IOP decrease at the onset of the stimulation, probably reflects a degree of smooth muscle relaxation in the ocular vessels which occurs even in the presence of maintained adrenergic stimulation. ...
... rebounds. The smaller amplitude of this pressure rise, in comparison with the magnitude of the equivalent IOP decrease at the onset of the stimulation, probably reflects a degree of smooth muscle relaxation in the ocular vessels which occurs even in the presence of maintained adrenergic stimulation. ...
The Appearance of Hyper-Reflective Superficial Epithelial Cells
... Hyper-reflective superficial cells were an unexpected finding while examining the corneal epithelium using confocal microscopy (CM), during an MSc thesis1 conducted in 2006 at the University of Waterloo, Canada. The author1 suggested that the appearance of these hyper-reflective cells could be assoc ...
... Hyper-reflective superficial cells were an unexpected finding while examining the corneal epithelium using confocal microscopy (CM), during an MSc thesis1 conducted in 2006 at the University of Waterloo, Canada. The author1 suggested that the appearance of these hyper-reflective cells could be assoc ...
vascularized cornea - UFDC Image Array 2
... The cornea of the Florida manatee is anatomically unique because blood vessels are found throughout the cornea. In all other species of animals, this is considered a pathological condition that impedes vision and is usually caused by injury or trauma of some sort. The purpose of this study was to de ...
... The cornea of the Florida manatee is anatomically unique because blood vessels are found throughout the cornea. In all other species of animals, this is considered a pathological condition that impedes vision and is usually caused by injury or trauma of some sort. The purpose of this study was to de ...
Corneal Crosslinking with Riboflavin and
... hydroxylysine, tyrosine and threonine); thus, the so-called crosslinkages are created. The formation of dityrosine from tyrosine, which can create the intermolecular and intramolecular linkages between collagen molecules, has also been observed.33-35 The amine groups do not play a major role in ribo ...
... hydroxylysine, tyrosine and threonine); thus, the so-called crosslinkages are created. The formation of dityrosine from tyrosine, which can create the intermolecular and intramolecular linkages between collagen molecules, has also been observed.33-35 The amine groups do not play a major role in ribo ...
Corneal topography in keratoconus: state of the art
... Corneal topographers based on this technology, also called videokeratoscopes, are based on the application of the principles of convex mirrors’ geometrical optics to an instrument in which the rings or Placido discs with known size and spacing are reflected on the anterior surface of the cornea. Thi ...
... Corneal topographers based on this technology, also called videokeratoscopes, are based on the application of the principles of convex mirrors’ geometrical optics to an instrument in which the rings or Placido discs with known size and spacing are reflected on the anterior surface of the cornea. Thi ...
History of Optometry - Indiana University School of Optometry
... profession, I do not know what it was. Yet they called >quacks those of us who fitted glasses to the eyes of the young....There were certain traveling >spec-peddlers= who went from house to house fitting glasses and unskillful though they were, relieving many of the simpler cases of eyestrain headac ...
... profession, I do not know what it was. Yet they called >quacks those of us who fitted glasses to the eyes of the young....There were certain traveling >spec-peddlers= who went from house to house fitting glasses and unskillful though they were, relieving many of the simpler cases of eyestrain headac ...
Meibomian gland imaging: A review
... Meibomian glands may be classified as holocrine glands embedded within the tarsal plate of both the superior and inferior lid margins.1 Individual meibomian glands consist of a central duct that passes through the length of the gland.2 Extending from this central duct are glandular structures termed ...
... Meibomian glands may be classified as holocrine glands embedded within the tarsal plate of both the superior and inferior lid margins.1 Individual meibomian glands consist of a central duct that passes through the length of the gland.2 Extending from this central duct are glandular structures termed ...
... works of art by the gratuitous gesture of the artist, thus dissolving the notion of “object of art.” Contradiction is the essence of the gesture4. With his ready-mades, Duchamp sought to make it difficult to define art at all, as he moved away from painting. However, in some cases, the artist may in ...
Safety Assessment of Tin(IV) Oxide as Used in Cosmetics
... incubation period was followed by an additional 30 ± 5 minutes of incubation. The CAM was then observed for signs of vascular hemorrhage, capillary injection, or ghost vessels (all positive responses indicating ocular irritation potential), and the RC50 was determined. The RC50 is defined as the con ...
... incubation period was followed by an additional 30 ± 5 minutes of incubation. The CAM was then observed for signs of vascular hemorrhage, capillary injection, or ghost vessels (all positive responses indicating ocular irritation potential), and the RC50 was determined. The RC50 is defined as the con ...
Iris pigmentation as a quantitative trait: variation in
... may also be of biomedical interest. Eye colour has been found to be associated with a number of ocular disorders (Mitchell et al., 1998; Wakamatsu et al., 2008). The most well known of these is perhaps age-related macular degeneration (AMD). This disease, which primarily affects older adults, result ...
... may also be of biomedical interest. Eye colour has been found to be associated with a number of ocular disorders (Mitchell et al., 1998; Wakamatsu et al., 2008). The most well known of these is perhaps age-related macular degeneration (AMD). This disease, which primarily affects older adults, result ...
Experimental porcine models of retinal ischemia
... Retinal ischaemia ensues when the retinal circulation is insufficient to meet the metabolic demands of the retina. This is most commonly caused by local circulatory failure resulting from vascular disease. The major diagnostic entities are diabetes mellitus, retinal vein thrombosis and retinal arter ...
... Retinal ischaemia ensues when the retinal circulation is insufficient to meet the metabolic demands of the retina. This is most commonly caused by local circulatory failure resulting from vascular disease. The major diagnostic entities are diabetes mellitus, retinal vein thrombosis and retinal arter ...
No Slide Title
... horizontal now been limb moved appears slowly toto move the right upwards, chart, and the On limbs move back their original positions andagain appear next mouse will place abefore Notice that the limbs aretoinclick theiryou correct position thecontinuous chart, and AGAINST the vertical the movement ...
... horizontal now been limb moved appears slowly toto move the right upwards, chart, and the On limbs move back their original positions andagain appear next mouse will place abefore Notice that the limbs aretoinclick theiryou correct position thecontinuous chart, and AGAINST the vertical the movement ...
Eye modelling for personalised intraocular lens design
... Unabridged IOL metrology results. Error bars represent ±2 standard deviations for all parameters. Anterior radius of curvature (blue diamonds), posterior radius of curvature (green triangles), and omitted posterior radius of curvature (green cross) are plotted against the left vertical axis. Central ...
... Unabridged IOL metrology results. Error bars represent ±2 standard deviations for all parameters. Anterior radius of curvature (blue diamonds), posterior radius of curvature (green triangles), and omitted posterior radius of curvature (green cross) are plotted against the left vertical axis. Central ...
Intrastromal corneal ring segments and posterior chamber phakic
... 40.0 D, and minimum corneal thickness more than 400 mm. In addition, the differences between the axis of the refractive cylinder and the axis of the corneal cylinder measured with a Javal keratometer and with an Orbscan IIz topographic system (Bausch & Lomb) had to be less than 30 degrees. Exclusion ...
... 40.0 D, and minimum corneal thickness more than 400 mm. In addition, the differences between the axis of the refractive cylinder and the axis of the corneal cylinder measured with a Javal keratometer and with an Orbscan IIz topographic system (Bausch & Lomb) had to be less than 30 degrees. Exclusion ...
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.