Examlex
Mental activities that require focused attention are called _____.
Lens
A lens is a piece of transparent material, typically glass or plastic, that refracts or focuses light rays, used in devices like glasses, cameras, and telescopes to enhance vision or capture images.
Fovea
A small depression in the retina where visual acuity is highest.
Optic Disc
The region in the eye where the optic nerve connects to the retina; also known as the blind spot.
Retina
The light-sensitive layer of tissue at the back of the eye, responsible for converting light into neural signals for vision.
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