Retinol
An animal form of Vitamin A. Retinol is converted from retinyl palmitate which is found in beef, chicken liver, eggs, fish liver oils, and dairy products including whole milk, whole mild yogurt and cottage cheese, butter, and cheese. (The plant based Vitamin A source is beta-carotene.) Vitamin A is essential to vision, especially night vision, bone and tooth development, reproduction, skin and mucous membranes.
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- Retinopathy
Any disease of the retina, the light-sensitive membrane at the back of the eye. The type of retinopathy is often specified, such as arteriosclerotic retinopathy, diabetic retinopathy, or hypertensive retinopathy.
- Retinopathy, arteriosclerotic
Arteriosclerotic retinopathy.
- Retinoschisis
Splitting of the retina. From retina + -schisis (splitting).
- Retrodiagnosis
Retrospective diagnosis. The proposal that the mysterious illness that killed Alexander the Great more than 2,300 years ago was West Nile fever is an exercise in retrodiagnosis.
- Retrograde amnesia
Amnesia in which the lack of memory relates to events that occurred before a traumatic event. Retrograde amnesia is in contrast to antegrade amnesia in which the lack of memory relates to events that occurred after a traumatic event.