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2 votes
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When do retinal cells stop differentiating?

why do eye conditions like retinoblastoma develop primarily in infants? One explanation is that infants grow fast. In general, each cell division is a risk of breaking/losing chromosomes. Breaks need ...
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6 votes
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Why does a non-functional retinoblastoma protein cause tumours in the cells of the retina specifically?

From Wikipedia: The retinoblastoma protein ... is a tumor suppressor protein that is dysfunctional in several major cancers So, although it's commonly associated with retinoblastoma, it's not ...
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5 votes

Why does there have to be two muscles to control the size of the pupil?

Short answer Agonist / antagonist muscle pairing in the form of the sphincter and dilator muscles in the iris allow for quick and powerful movements of both the constriction and the dilatory response. ...
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