Eye color, which is a result of iris pigmentation, doesn't affect the quality of vision. Research shows that the shape of the eyeball, the state of the lens, and the health of the retina are the ...

New research published in Cognition and Emotion provides evidence that subtle changes in eye appearance can shape how people perceive ... However, the role of iris brightness in enhancing these ...

This is the part of the eye that lets the light in. Lights out please! When it’s dark, muscles in the iris make the pupil ... The rods see the shapes of things, picking out black, white and ...

It measures how well they can see the contrast between white paper and light gray shapes. The ophthalmologist ... the transparent part of the eye covering the iris and pupil — progressively ...