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Further computer simulations showed that green and red are concentrated five to ten times more by the glial cells, and into their respective cones, than blue light. Instead, excess blue light gets scattered to the surrounding rods.This optimization is such that color vision during the day is enhanced, while night-time vision suffers very little". Rod cells function well in low light, providing us with our night vision. They contribute little to colour vision, which is why we find it difficult to distinguish colours in darkness. They tend to be concentrated around the edge of the retina and are also used for peripheral vision. The retina, along with the optic nerve, develops in the embryo as part of the brain tissue, making it part of the central nervous system. Being a nervous tissue, the retina doesn’t have the ability to regenerate itself.
Diagnosis and treatment - Mayo Clinic Retinal diseases - Diagnosis and treatment - Mayo Clinic
Writer John Gruber suggested that the arrival of Retina displays on computers would trigger a need to redesign interfaces and designs for the new displays: Precision and innovation have always been a part of the iMac story. Bringing the Retina 5K display to the 27-inch iMac was no different. It meant making incredible leaps in design at every level — from reengineering the brains of the display to maintaining 1/100th of a micron tolerances within the display cell. Not to mention fitting four times as many pixels — and the power to drive them — inside. All without compromising the amazingly thin iMac design. Want to know how a Liquid Retina Display is different from the original Retina Display? Find out What Is a Liquid Retina Display? Apple Products With Retina Display Diabetic retinopathy– diabetes causes the capillaries that supply the retina to leak fluid into or under the retina, leading to swelling and distorted vision.
Depending on your result, you may be advised to attend more regular appointments or discuss treatment options with a specialist. Macular edema. This is an accumulation of fluid and swelling of the macula, causing distortion and blurred central vision. Macular edema has several causes, including diabetes. In some cases, swelling of the macula also can occur after cataract surgery. It's not clear exactly why PVD can lead to retinal detachment in some people and there's nothing you can do to prevent it. But it's more likely to happen if you:
Retinal detachment - Moorfields Eye Hospital
There is a wide variety of retina problems, conditions and diseases. Here is a short list of the more common retina problems: Apple– Learn about the Retina display". Archived from the original on February 7, 2011 . Retrieved June 21, 2010. Both hypertension and diabetes mellitus can cause damage to the tiny blood vessels that supply the retina, leading to hypertensive retinopathy and diabetic retinopathy. They will then perform a comprehensive eye exam with a particular focus on the retina and the macula. They will use a special instrument called an ophthalmoscope to investigate the inside of the eye.
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Retinal detachment. A retinal detachment is defined by the presence of fluid under the retina. This usually occurs when fluid passes through a retinal tear, causing the retina to lift away from the underlying tissue layers. As of January 2018, nearly every Apple product with a built-in display is rated as Retina or better. The main exception is the Ask a family member or friend to accompany you. Having your pupils dilated for the eye exam will affect your vision for a time afterward, so you may need someone to drive or accompany you after your appointment. Retinal conditions can affect your eyesight with different degrees of severity. They can be either acquired or inherited:
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