African Vision and Eye HealthGool, R. D., Harris, W. F. (2005) The concept of the average eye. The South African Optometrist 64: pp. 38-43van Gool R D, Harris W F. The concept of the average eye. The South African Optometrist, 2005, 64(2): 38-43...
The average residual defocus was about − 0.1 D and the residual cylinder about 0.2 D, with 85% of the eyes within 0.50 D and 97% within 1.0 D of emmetropia. This might be specific to the SCHWIND laser, which is calibrated for all treatments to achieve − 0.2 D of residual ...
Amblyopia (lazy eye). If one eye has weaker vision than the other, the brain relies on the stronger eye. The weaker eye's vision gets worse. Cataracts. The lens inside the eye gets cloudy, reducing vision.Cataractsare common in older people, but children can have cataracts because of infe...
The choroid layer begins in the peripheral edges of the eyeball and lines the entire back of it, sandwiched between the sclera and the retina. The thickness of the choroid varies depending on what part of the eye it’s lining. For example, it’s the thickest in the back of the eye (a...
1. A sudden onset of many spots and floaters in your field of vision Usually,eye floatersare due to a benign, age-related condition called vitreous detachment. This occurs when the eye's gel-like interior liquefies and separates from the retina, the light-sensitive inner lining of the back...
Some 68% of a typical second earner's net income is spent on freeing her to work, compared with an OECD average of 52%. The price of child care is not only eye-watering, but has also become a barrier to work. Soon after it took power the coalition government pledged to ensure that...
To date, the literature has shown that the physical information of both eyes is combined in such a way that we perceive the directions of objects as though we were viewing the world from an imaginary eye (the cyclopean eye) positioned midway between our eyes. That is, the two eyes operate...
Sequential A scans in the horizontal or vertical plane generate a 2-dimensional thickness profile across the retina: the B scan Average thickness of peripheral and central retinal subfieldsThinning predominantly reflects neuronal loss. May also reflect intraretinal capillary rarefactionThickening reflects ...
Vision Light The amount of light entering the eye is controlled by the iris, which is a thin pigmented smooth muscle with different individual characteristics. These form a unique pattern in each individual, so that it is possible to use the iris as a means of identification that is more foo...
Epithelial stem cells: the eye provides a vision Eye (2003) 17, 937–942 & 2003 Nature Publishing Group All rights reserved 0950-222X/03 $25.00 www.nature.com/eye RM Lavker1 and T-T Sun2 Abstract Epithelial stem cells play a central role in tissue homeostasis, wound repair, and ...