In the context of vision, sharp refers to clear and detailed visual perception.
Fovea: The fovea is a small depression in the retina that contains the highest concentration of cone cells, responsible for sharp central vision.
Visual acuity: Visual acuity refers to the clarity or sharpness of vision, typically measured using an eye chart.
The retina is a layer at the back of the eye that contains photoreceptor cells (rods and cones) and sends visual information to the brain.