Quiz 8: Regeneration in Biology

Partial blindness

Also defined as low vision; visual acuity makes everyday tasks difficult and cannot be improved with glasses or contacts

Legal blindness

Government classification; unable to see at six meters what someone with normal vision can see at 60 meters

Complete blindness

Occurs when a person has no light perception (NLP)

Color blindness

Any form of color vision deficiency, which is an eye condition that makes it difficult for the eyes to see color correctly

Cornea

The transparent layer forming the front of the eye

Retina

A light-sensitive layer of tissue at the back of the eye that converts light into neural signals, sending them to the brain for vision

Retinal ganglion cells

Neurons that process visual information from photoreceptors and transmit it to the brain via the optic nerve

Rod photoreceptor

Neurons in the retina responsible for low-light (scotopic) and peripheral vision

Cone photoreceptor

Responsible for high-acuity vision and color perception in daylight

Retinal pigment epithelium

Supports photoreceptor function through nutrient transport, light absorption, and phagocytosis of waste

Fovea

A small spot within the macula with a high density of cones

Blind spot

Lacks photoreceptors, where the retinal ganglion cells form the optic nerve and exit the optic cup

Allogeneic

Cells, transplanted from a healthy donor to a different recipient of the same species