THE optical aids conventionally used for the improvement of sub-normal vision at near viewing distances (for example, reading) comprise compound, short microscopic systems of varying ...

The researchers' study said that in normal vision, "any light that stimulates an M cone cell must also stimulate its neighboring L and/or S cones" because its function overlaps with them.

The new color, "olo," is a hyper-saturated version of blue-green Getty Scientists conducting targeted retinal stimulation claim to have discovered a new color. In a study published in Science ...

Carrots are high in beta carotene, a component of vitamin A, which is critical to normal vision. It's no coincidence that in countries where rice is a dietary staple but carrots and other sources ...