opticiancertif

Fluid pressure exerted inside the eyeball (ocular globe), which keeps the wall taut.

The concept that even though several members of a family or population may have the same DNA mutation, not everyone with that mutation will have or develop the disease. This is in contrast to variable expressivity which means that people with the same disease have varying disease severity. Penetrance, in contrast, is more of a yes/no question ? does or does not the person have the disease.

Long-sightedness, requiring a convex lens to focus the vision.