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Probably, you can find this article (link to PDF) useful - I placed an excerpt, the following part in the PDF itself explains the theories. Also, in PubMed you can find a lot of explanations, for example (cited 225 times):


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The endothelial cells in small blood vessels take in more glucose even if insulin level is high (insulin level increases as a feedback reaction in type II diabetes or after treatment in type I diabetes), because they don't have insulin receptors. Thus they form surface glycoproteins which causes the basement membrane to become thicker yet less strong. This ...


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This is quite common. It is most likely dried rheum (also know by slang terms such as "sleep", "eye boogers", "eye crusties", etc.). Rheum is the result of dried mucus, tears (and the salt and minerals therein), as well as dead blood and skin cells. Essentially it is all the stuff that’s normally in your eye that eventually dries up making the contents ...


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First of all, I should quote the sentence from the MOST reliable ophthalmology sourcing in the world - American Academy of Ophthalmology: Section 11 - "Lens and Cataract" "The equatorial diameter of the unfixed human lens measures 2 mm at 12 weeks and 6 mm at 35 weeks. Both the growth and the maturation of lenticular fibers continue throughout life." The ...


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With age your eyeball, as everything else in your body with time, actually shrinks. In the developing stages I'm not sure when it reaches its full size though. So this is why elder often report far sightedness, when they need reading glasses. This is because the image no longer falls on the retina perfectly. When you are near sighted your eye is actually too ...


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No. In fact the lens of the eye, which is nearly optically perfect in humans, does not change or grow after it is fully formed around week 26 of gestation. Interestingly this is why one of the cues for identifying young children is having small faces with large eyes. This also the case for puppies and cats and other animals, who are mostly cuter when they ...


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Let us say this myopic patient has amplitude of accommodation of 8D. The patient accommodates 8D beyond far point, thus his near point is 1/6+8=0.07m (7.1cm). If we compare the case with emmetropic eye with accommodation amplitude of 8D, the near point is 1/8=0.12m (12cm). So, yes, near point of myopic person is different from an emmetropic one. But, you ...


2

The cones and rods would not contain the images from our dreams. Visual scenes get transferred from the eye to the thalamus (which serves as a relay to the cortex) by optical fibers that are overwhelmingly uni-directional (information is carried from the eyes to the thalamus and not vice-versa). Dreams do, however, activate the thalamus, the visual cortex, ...



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