Laser Safety Fundamentals - Environmental Health and Safety
... 2.3.3 In the Visible (400-700 nm) and Infrared-A (700-1400 nm) range severe damage can occur to the retina due to the focusing effect of the cornea and lens, which can increase the irradiance on the retina by as much as 100,000 times. The natural aversion reflex of the eye (0.25 seconds) can reduce ...
... 2.3.3 In the Visible (400-700 nm) and Infrared-A (700-1400 nm) range severe damage can occur to the retina due to the focusing effect of the cornea and lens, which can increase the irradiance on the retina by as much as 100,000 times. The natural aversion reflex of the eye (0.25 seconds) can reduce ...
Causes of eye removal – analysis of 586 eyes
... Background/Aim. Eye enucleation is one of the oldest surgical procedures. The aim of the study was to determine the causes of enucleation as seen in a major reference eye center in Serbia. Methods. Retrospective case series involving a review of all enucleation procedures performed in the period bet ...
... Background/Aim. Eye enucleation is one of the oldest surgical procedures. The aim of the study was to determine the causes of enucleation as seen in a major reference eye center in Serbia. Methods. Retrospective case series involving a review of all enucleation procedures performed in the period bet ...
Unit 15 Ophthalmology, Endocrinology, and Medical Specialties
... – Deterioration of macula • Area on retina near optic nerve ...
... – Deterioration of macula • Area on retina near optic nerve ...
Diffuse Iris Melanoma in a Cat
... Background: Diffuse iris melanoma is rare, although is the most common primary intraocular neoplasm in cats, and is an unusual variant of anterior uveal melanoma. This neoplasm is malignant with high potential methastazed. Affects olders cats without breed or sex predisposition. The diagnosis can be ...
... Background: Diffuse iris melanoma is rare, although is the most common primary intraocular neoplasm in cats, and is an unusual variant of anterior uveal melanoma. This neoplasm is malignant with high potential methastazed. Affects olders cats without breed or sex predisposition. The diagnosis can be ...
The Diagnostic Accuracy of Bedside Ocular Ultrasonography
... conditions are not always mutually exclusive. Standard views include axial and sagittal orientations. In only 1 of the studies did the sonographer ask the patient to look left and right to evaluate for retinal detachment versus vitreous hemorrhage or vitreous detachment.6 This technique can help dif ...
... conditions are not always mutually exclusive. Standard views include axial and sagittal orientations. In only 1 of the studies did the sonographer ask the patient to look left and right to evaluate for retinal detachment versus vitreous hemorrhage or vitreous detachment.6 This technique can help dif ...
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... angiography. With that method an image of the blood vessels is obtained. This technique has the advantage that it can be used to rule out dierential diagnoses. Other ways to investigate are by computer tomography, magnetic resonance or nuclear medicine. However, they do not provide more information ...
... angiography. With that method an image of the blood vessels is obtained. This technique has the advantage that it can be used to rule out dierential diagnoses. Other ways to investigate are by computer tomography, magnetic resonance or nuclear medicine. However, they do not provide more information ...
Volume change of the ocular lens during accommodation
... inevitably must involve changes in either capsular surface area or lens volume, or both. Classic theories of lenticular accommodation suggest that the volume of the intraocular crystalline lens remains constant during the accommodation process (16, 17, 30). No empirical studies have demonstrated tha ...
... inevitably must involve changes in either capsular surface area or lens volume, or both. Classic theories of lenticular accommodation suggest that the volume of the intraocular crystalline lens remains constant during the accommodation process (16, 17, 30). No empirical studies have demonstrated tha ...
Lipid composition of human meibum: a review
... Meibum composition in Dry Eye Disease Dry eye disease is a multifactorial disease of the tears and ocular surface55. Tear break-up time (TBUT) measured in seconds, is a common diagnostic tool used by ophthalmologists and optometrists to diagnose dry eye disease. TBUT can be defined as the ...
... Meibum composition in Dry Eye Disease Dry eye disease is a multifactorial disease of the tears and ocular surface55. Tear break-up time (TBUT) measured in seconds, is a common diagnostic tool used by ophthalmologists and optometrists to diagnose dry eye disease. TBUT can be defined as the ...
CRST`s Third Annual State of the Art Technology Symposium
... success treating astigmatism, but I think a laser works better for that application. Dr. Doane: How do you sell the collagen shrinkage concept of CK? Is the effect temporary or permanent? If it is temporary, how long do you expect the effects to last in a patient who is a plano presbyope or who has ...
... success treating astigmatism, but I think a laser works better for that application. Dr. Doane: How do you sell the collagen shrinkage concept of CK? Is the effect temporary or permanent? If it is temporary, how long do you expect the effects to last in a patient who is a plano presbyope or who has ...
IOSR Journal of Dental and Medical Sciences (IOSR-JDMS)
... progressive nature, and because it is the second leading preventable causes of blindness in the world1. With appropriate screening and treatment, glaucoma usually can be identified and its progress can be arrested before significant effect on vision occurs. Intraocular Pressure is a function of the ...
... progressive nature, and because it is the second leading preventable causes of blindness in the world1. With appropriate screening and treatment, glaucoma usually can be identified and its progress can be arrested before significant effect on vision occurs. Intraocular Pressure is a function of the ...
Inhibition of vascularization in rabbit corneas by heparin
... The eye was proptosed and the entire corneal and limbal epithelia and a 2-3 mm ring of bulbar conjunctival epithelium were removed using heptanol as described previously.1'3'7 After the heptanol had been in contact with the ocular surface for 1 min, the eyes were washed thoroughly with saline. Then, ...
... The eye was proptosed and the entire corneal and limbal epithelia and a 2-3 mm ring of bulbar conjunctival epithelium were removed using heptanol as described previously.1'3'7 After the heptanol had been in contact with the ocular surface for 1 min, the eyes were washed thoroughly with saline. Then, ...
Full version (PDF file)
... after one daily dose of UVB rays (1.01 J/cm2). Examination of the absorption coefficient α at various wavelengths suggests that the increase in corneal light absorption is initially mainly due to an increase in corneal hydration and later – with further irradiation – also due to changes in corneal c ...
... after one daily dose of UVB rays (1.01 J/cm2). Examination of the absorption coefficient α at various wavelengths suggests that the increase in corneal light absorption is initially mainly due to an increase in corneal hydration and later – with further irradiation – also due to changes in corneal c ...
AAO Seattle 2013 Thyroid Dysfunction and the Eye
... $ The eye symptoms usually occur at the same time as the thyroid ...
... $ The eye symptoms usually occur at the same time as the thyroid ...
Ultrahigh-resolution high-speed retinal imaging using spectral-domain optical coherence tomography
... macular degeneration. The first in vivo retinal SD-OCT images were presented by Wojtkowski et al.[19] In our previous work, we demonstrated an SD-OCT system suitable for in vivo video-rate ophthalmic imaging. [18, 20] This system had a sensitivity of 98.4 dB, an acquisition rate of 29,300 A-lines p ...
... macular degeneration. The first in vivo retinal SD-OCT images were presented by Wojtkowski et al.[19] In our previous work, we demonstrated an SD-OCT system suitable for in vivo video-rate ophthalmic imaging. [18, 20] This system had a sensitivity of 98.4 dB, an acquisition rate of 29,300 A-lines p ...
Soria_PHA Cebu 2016 - Philippine Hospital Association
... – blood is removed from the body and filtered through a man-made membrane called a dialyzer, or artificial kidney, and then the filtered blood is returned to the body. -A dialysis technique that uses the patient's own body tissues inside the abdominal cavity as a filter. A plastic tube called a dial ...
... – blood is removed from the body and filtered through a man-made membrane called a dialyzer, or artificial kidney, and then the filtered blood is returned to the body. -A dialysis technique that uses the patient's own body tissues inside the abdominal cavity as a filter. A plastic tube called a dial ...
Take second look at - ModernMedicine.com
... ophthalmologists’ ability to reduce its rate and understand its risk factors has grown substantially, Dr. Schein noted. He addressed acute endophthalmitis that occurs within the first week or so of cataract surgery. Virtually all (95% plus), according to Dr. Schein, are gram positive. “We either let ...
... ophthalmologists’ ability to reduce its rate and understand its risk factors has grown substantially, Dr. Schein noted. He addressed acute endophthalmitis that occurs within the first week or so of cataract surgery. Virtually all (95% plus), according to Dr. Schein, are gram positive. “We either let ...
pdf
... Fig. 15: Axial T2W (a) gradient echo (b) T1W (c) and sagittal T2W images (d,e) from an MRI orbits were performed following trauma to assess for globe rupture. There is retinal and choroidal detachment noted, the latter involving the ciliary body medially (a). An underlying subretinal/suprachoroidal ...
... Fig. 15: Axial T2W (a) gradient echo (b) T1W (c) and sagittal T2W images (d,e) from an MRI orbits were performed following trauma to assess for globe rupture. There is retinal and choroidal detachment noted, the latter involving the ciliary body medially (a). An underlying subretinal/suprachoroidal ...
Tripathy (1994) Long-range dichoptic interactions in the
... cells receive excitatory inputs from the two eyes (Poggio & Fischer, 1977). However, there are two regions of the visual field that are notable exceptions with regard to binocularity: the optic disk or blind spot and the monocular crescent of each eye. The physiological blind spot in normal observer ...
... cells receive excitatory inputs from the two eyes (Poggio & Fischer, 1977). However, there are two regions of the visual field that are notable exceptions with regard to binocularity: the optic disk or blind spot and the monocular crescent of each eye. The physiological blind spot in normal observer ...
Iris ultrastructure in patients with synechiae as revealed byin
... microscopy (LSCM). Methods: The ultrastructure of iris in thirty one patients, each with synechiae but transparent cornea, was examined by in vivo LSCM. Results: Five characteristic iris ultrastructures was revealed in patients with synechiae by in vivo LSCM, which include: 1. tree trunk-like struct ...
... microscopy (LSCM). Methods: The ultrastructure of iris in thirty one patients, each with synechiae but transparent cornea, was examined by in vivo LSCM. Results: Five characteristic iris ultrastructures was revealed in patients with synechiae by in vivo LSCM, which include: 1. tree trunk-like struct ...
View 2009-10 Annual Report - Jules Stein Eye Institute
... Society at its annual meeting in Boston, Massachusetts, on July 25, 2009. The award, which recognizes significant technical achievements in the field of protein science, was presented to Dr. Hubbell for the development, application, and advocacy of site-directed spin labeling of proteins. Site-direc ...
... Society at its annual meeting in Boston, Massachusetts, on July 25, 2009. The award, which recognizes significant technical achievements in the field of protein science, was presented to Dr. Hubbell for the development, application, and advocacy of site-directed spin labeling of proteins. Site-direc ...
ophthalmic in-situ gel: an overview
... At first sight, the eye seems an ideal, easily accessible target organ for topical treatment. However, the eye is, in fact, well protected against absorption of foreign materials, first by eyelids and tear‐flow and then by the cornea, which forms the physical‐ biological barrier.When any foreign mat ...
... At first sight, the eye seems an ideal, easily accessible target organ for topical treatment. However, the eye is, in fact, well protected against absorption of foreign materials, first by eyelids and tear‐flow and then by the cornea, which forms the physical‐ biological barrier.When any foreign mat ...
Multifocal Contact Lens Myopia Control
... Purpose. Previous studies on soft multifocal contact lens myopia control published in the peer-reviewed literature reported findings of noncommercial contact lenses worn for 1 year or less. This study sought to determine the progression of myopia and axial elongation of children fitted with commerci ...
... Purpose. Previous studies on soft multifocal contact lens myopia control published in the peer-reviewed literature reported findings of noncommercial contact lenses worn for 1 year or less. This study sought to determine the progression of myopia and axial elongation of children fitted with commerci ...
Isolated inferior rectus muscle rupture following trauma Case report
... rectus muscle was easily visualized. Computed tomography (CT) revealed a normal right orbit except edema at periorbital region. Urgent surgical intervention was performed within 8 hours of presentation. After informing the patient about the surgery and risks, we chose to perform surgery under local ...
... rectus muscle was easily visualized. Computed tomography (CT) revealed a normal right orbit except edema at periorbital region. Urgent surgical intervention was performed within 8 hours of presentation. After informing the patient about the surgery and risks, we chose to perform surgery under local ...
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.