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I'm not a eye doctor but I do workout. I would like to say something about your metaphor or comparison from the ciliary muscle to the body muscles. Let's look at a workout. In a workout, you strain the muscle then relax the muscle repeatedly until you exhaust the muscle. Another part of the exercise is stretching. If you don't stretch, you will lose full ...


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Short answer Optical filters can optimize color contrast, but never restore color blindness. However, glasses like this can prove helpful for certain sub-populations of people that are partially color blind. Background First, the term color blindness is deceptive. It is better to talk about colour vision deficiency (CVD). This, because many people labeled ...


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These species likely don't see you as a predator, or if they do they don't know if you've seen them yet. A study indicated that the vision of the White-tailed deer was good; As expected for a crepuscularly active prey species, the visual system of white-tailed deer is specialized for sensitivity in low-light conditions and detection of predators. The ...



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