Light-emitting diodes (LED) for domestic lighting: Any
... Light is an electromagnetic radiation visible by the intact adult human eye in the range of 380e780 nm, spanning from violet to red light. Like all radiations, light carries energy, the shorter wavelengths being the most energetic ones. Radiometric quantities define energy-related parameters of optic ...
... Light is an electromagnetic radiation visible by the intact adult human eye in the range of 380e780 nm, spanning from violet to red light. Like all radiations, light carries energy, the shorter wavelengths being the most energetic ones. Radiometric quantities define energy-related parameters of optic ...
Understanding nystagmus
... point and this is repeated over and over until the train has passed. This type of nystagmus is called “physiological nystagmus” and it is a normal part of how our eyes work. If the visual pathways, or parts of the brain that process visual information, control eye movements or gaze, do not develop p ...
... point and this is repeated over and over until the train has passed. This type of nystagmus is called “physiological nystagmus” and it is a normal part of how our eyes work. If the visual pathways, or parts of the brain that process visual information, control eye movements or gaze, do not develop p ...
Central retinal vein occlusion as an uncommon complication of
... involvement high-dose systemic and local prednisolone was instituted and the eye lesions diminished within days ( figure 1B). ...
... involvement high-dose systemic and local prednisolone was instituted and the eye lesions diminished within days ( figure 1B). ...
Human cornea organ cultures: epithelial-endothelial
... the case of traumatic laceration, for example, epithelial invasion of the anterior chamber might occur if the endothelium were sufficiently damaged or destroyed. In the present study, it is shown that diseased endothelium, in the form of cornea guttata, does not inhibit migration of corneal epitheli ...
... the case of traumatic laceration, for example, epithelial invasion of the anterior chamber might occur if the endothelium were sufficiently damaged or destroyed. In the present study, it is shown that diseased endothelium, in the form of cornea guttata, does not inhibit migration of corneal epitheli ...
... The retina makes up the innermost for a clear visual image to form. layer of the wall of the eyeball. It is However, the light-rays that objects about as fragile as a piece of wet tissue reflect or give off do not naturally paper. the retina is made up of two move toward one another. Instead, types ...
PHYSIOLOGY of EQUILIBRIUM
... slow phase during the time that the eyes were closed. When the eyes open a recovery (fast phase of the nystagmus) will occur once, indicating that there may be a slight nystagmus towards that direction. Of course suppression of the nystagmus can still occur due to cerebral (brain) suppression, e.g. ...
... slow phase during the time that the eyes were closed. When the eyes open a recovery (fast phase of the nystagmus) will occur once, indicating that there may be a slight nystagmus towards that direction. Of course suppression of the nystagmus can still occur due to cerebral (brain) suppression, e.g. ...
Pediatric Strabismus - Database Reserved Area
... this frontal migration resulted in increasing overlap of each eye’s visual field and conferred the advantage of stereopsis (depth perception). In mammals, inputs from the two eyes converge on binocular neurons in the visual cortex, which are thought to be the neural substrate for stereopsis. Maturat ...
... this frontal migration resulted in increasing overlap of each eye’s visual field and conferred the advantage of stereopsis (depth perception). In mammals, inputs from the two eyes converge on binocular neurons in the visual cortex, which are thought to be the neural substrate for stereopsis. Maturat ...
Endoscope-assisted vitrectomy Mihori Kita CITATION Kita M
... rate of initial surgery in pseudophakic and aphakic retinal detachment compared to phakic cases. Furthermore, capsular opacity, lens remnants, and/or a small pupil could prevent the identification of these retinal breaks. Therefore, the visualization of retinal breaks can simplify surgery and impro ...
... rate of initial surgery in pseudophakic and aphakic retinal detachment compared to phakic cases. Furthermore, capsular opacity, lens remnants, and/or a small pupil could prevent the identification of these retinal breaks. Therefore, the visualization of retinal breaks can simplify surgery and impro ...
Cystic Epithelial Ingrowth in a Case of Deep Anterior Lamellar
... sentinel lymph node metastases as high as 46% have been documented, liver metastasis occurred in only 1 case, with the patient being well 2 years after resection. One lethal case has been reported.1,2,5 It is not clear whether, after excisional biopsy, re-excision with margins as wide as those for c ...
... sentinel lymph node metastases as high as 46% have been documented, liver metastasis occurred in only 1 case, with the patient being well 2 years after resection. One lethal case has been reported.1,2,5 It is not clear whether, after excisional biopsy, re-excision with margins as wide as those for c ...
Imaging of Orbital Trauma1
... injury is associated with injuries involving multiple organs. Common posttraumatic orbital injuries include anterior chamber injuries, injuries to the lens, open-globe injuries, ocular detachments, intraorbital foreign bodies, carotid cavernous fistula, and optic nerve injuries. Radiographic examina ...
... injury is associated with injuries involving multiple organs. Common posttraumatic orbital injuries include anterior chamber injuries, injuries to the lens, open-globe injuries, ocular detachments, intraorbital foreign bodies, carotid cavernous fistula, and optic nerve injuries. Radiographic examina ...
TYPES OF STRABISMUS Pseudostrabismus. Heterophoria (latent
... The first examination includes evaluation of refractive error and prescription of appriopriate eye-glasses or contact lenses. If amblyopia is present, it is initially treated with the full-time occlusion of the sound eye. Frequent follow-up visits are necessary, every few weeks, as the visual acuity ...
... The first examination includes evaluation of refractive error and prescription of appriopriate eye-glasses or contact lenses. If amblyopia is present, it is initially treated with the full-time occlusion of the sound eye. Frequent follow-up visits are necessary, every few weeks, as the visual acuity ...
Mechanism of Aqueous Humor Secretion, Its Regulation
... transmit it to the brain to create vision. This requires that the structures of the eye involved in light transmission, such as the cornea and the lens, must be transparent. Unlike other tissues of the body, nutrients and oxygen supply to these structures must be accomplished without blood interfere ...
... transmit it to the brain to create vision. This requires that the structures of the eye involved in light transmission, such as the cornea and the lens, must be transparent. Unlike other tissues of the body, nutrients and oxygen supply to these structures must be accomplished without blood interfere ...
Telemedicine and screening around the world
... to reproduce any abstract, contact the ARVO Office at [email protected]. ...
... to reproduce any abstract, contact the ARVO Office at [email protected]. ...
Acute Inflammation and Loss of Retinal Architecture and Function
... 109 CFU/eye by 12 hr. At this time, eyes injected with 102 bacilli presented with posterior and anterior segment inflammation and other signs of infection similar to that of the experimental rabbit model at the same time point (described below).9−14 At 12 hr postinfection, eyes injected with 103 baci ...
... 109 CFU/eye by 12 hr. At this time, eyes injected with 102 bacilli presented with posterior and anterior segment inflammation and other signs of infection similar to that of the experimental rabbit model at the same time point (described below).9−14 At 12 hr postinfection, eyes injected with 103 baci ...
Intraocular pressure and CCT - Canadian Ophthalmological Society
... • These points should bracket the threshold level evenly—the higher the level being tested, the greater the interval is likely to be. ...
... • These points should bracket the threshold level evenly—the higher the level being tested, the greater the interval is likely to be. ...
Manganese-Enhanced MRI for Preclinical Evaluation of Retinal
... tropicamide for imaging. Four images acquired in the B-scan mode were averaged to construct each final SD-OCT image. The outer nuclear layer (ONL) thickness was quantified with Bioptigen software at 150, 300, and 450 lm from the ocular nerve head in the temporal-nasal and superior-inferior direction ...
... tropicamide for imaging. Four images acquired in the B-scan mode were averaged to construct each final SD-OCT image. The outer nuclear layer (ONL) thickness was quantified with Bioptigen software at 150, 300, and 450 lm from the ocular nerve head in the temporal-nasal and superior-inferior direction ...
UNIVERZITA KOMENSKČHO V BRATISLAVE LEKARSKA FAKULTA
... neck support. The head must be secured with a slight tilt so the operated eye is in a higher plane to clear the nose and achieve proper applanation. The patient must be able to remain still for the several minutes required for accurate imaging followed by application of laser energy. There are also ...
... neck support. The head must be secured with a slight tilt so the operated eye is in a higher plane to clear the nose and achieve proper applanation. The patient must be able to remain still for the several minutes required for accurate imaging followed by application of laser energy. There are also ...
pdf
... Optic drusen are abnormal globular concretions of protein and calcium salts which accumulate in the optic nerve and usually become visible after the first decade of life. They occur in both eyes more often than just one. Although drusen can be identified in childhood, they are small and non-minerali ...
... Optic drusen are abnormal globular concretions of protein and calcium salts which accumulate in the optic nerve and usually become visible after the first decade of life. They occur in both eyes more often than just one. Although drusen can be identified in childhood, they are small and non-minerali ...
Corneal Inlays - The New Frontier
... Formerly known as PresbyLens in the U.S. and Vue+ in Europe ...
... Formerly known as PresbyLens in the U.S. and Vue+ in Europe ...
use of compound microscope
... power. Magnification means an increase in an apparent size of the object as compared to its actual size. Resolving power or resolution is the smallest distance between two point-like objects which can just be recognized as separate. It is achieved if the visual angle between the object details thems ...
... power. Magnification means an increase in an apparent size of the object as compared to its actual size. Resolving power or resolution is the smallest distance between two point-like objects which can just be recognized as separate. It is achieved if the visual angle between the object details thems ...
The Aberration
... surgery. In patients without weak zonules or another predisposing condition, the reasons for decentration include in-out of the bag placement, incongruency between bag diameter and overall diameter of lens, large capsulorhexis, asymmetrical capsular coverage, lens placement in sulcus, capsular fibro ...
... surgery. In patients without weak zonules or another predisposing condition, the reasons for decentration include in-out of the bag placement, incongruency between bag diameter and overall diameter of lens, large capsulorhexis, asymmetrical capsular coverage, lens placement in sulcus, capsular fibro ...
pterygium: a new surgical technique
... A Pterygium is an elevated, superficial, external ocular mass that usually forms over the perilimbal conjunctiva and extends onto the corneal surface. Pterygia can vary from small, atrophic quiescent lesions to large aggressive rapid growing fibro vascular lesions that can distort the corneal topogr ...
... A Pterygium is an elevated, superficial, external ocular mass that usually forms over the perilimbal conjunctiva and extends onto the corneal surface. Pterygia can vary from small, atrophic quiescent lesions to large aggressive rapid growing fibro vascular lesions that can distort the corneal topogr ...
Binocular decompensation and diplopia after refractive laser surgery
... surgical mistake, and according to the refractive result the surgery was successful. When operating on patients with moderate and high myopia, it is important to remember that the accommodative and convergence demands will increase after the surgery (for an explanation, see Rabbetts 1998). The accom ...
... surgical mistake, and according to the refractive result the surgery was successful. When operating on patients with moderate and high myopia, it is important to remember that the accommodative and convergence demands will increase after the surgery (for an explanation, see Rabbetts 1998). The accom ...
Spectral Domain Optical Coherence Tomography Imaging of Retinal
... thickening (Fig. 1C). SD-OCT showed more precisely the extent of RPE detachment underlying the foveal detachment (Fig. 1D). The cross-hairs of the SD-OCT scan output were placed over the polyps as guided by ICGA. The polyps were not visualized on SD-OCT images; irregularity and thickening of outer r ...
... thickening (Fig. 1C). SD-OCT showed more precisely the extent of RPE detachment underlying the foveal detachment (Fig. 1D). The cross-hairs of the SD-OCT scan output were placed over the polyps as guided by ICGA. The polyps were not visualized on SD-OCT images; irregularity and thickening of outer r ...
Are Contact Lenses Interchangeable?
... Contact lenses are not merely pieces of plastic that inertly rest on the front of the eye. Several crossover studies that compared a variety of outcomes when fitting subjects with a variety of contact lenses showed that the subjects’ physiological reactions and the contact lens parameters differed, ...
... Contact lenses are not merely pieces of plastic that inertly rest on the front of the eye. Several crossover studies that compared a variety of outcomes when fitting subjects with a variety of contact lenses showed that the subjects’ physiological reactions and the contact lens parameters differed, ...
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.