Cones

A) Photoreceptor cells that function in black and white vision
B) Photoreceptor cells that function in color vision
C) The opening in the iris
D) The innermost tunic of the eye
E) A pigmented contractile structure

Cones

Photoreceptor cells in the retina of the eye responsible for color vision and high acuity vision in well-lit conditions.

Photoreceptor Cells

Specialized cells in the retina of the eye that respond to light, allowing for the perception of vision.

Innermost Tunic

Refers to the deepest layer of an anatomical structure, often used in context with the eye's layers, specifically the retina.