Alteration of aqueous humor drainage in an eye with glaucoma. It
shows how a blockage in the trabecular meshwork or in Schlemm’s
canal prevents proper fluid flow, causing an increase in intraocular
pressure.
Human eye anatomy includes structures such as the cornea,
iris, pupil, lens, retina, and optic nerve. These components work
together to focus light, convert it into nerve signals, and allow
the brain to perceive visual images clearly.
The eyeball is a spherical structure composed of layers
such as the sclera, cornea, and retina. These structures
allow light to enter the eye, focus images, and convert
light into nerve signals for vision.
The eyelids protect the eye and help maintain ocular
moisture through blinking. Eyelashes and sebaceous
glands prevent particles from entering the eye and
support tear film stability.
The optic nerve connects the retina to the brain and
transmits electrical signals generated by photoreceptors.
These signals are processed in the visual cortex, allowing
the brain to interpret visual images.
Astigmatism affects vision. People with astigmatism see things
blurry and distorted, and have trouble focusing both up close and
far away. Glasses, contact lenses, and refractive procedures like
laser surgery can correct astigmatism.
The cataract focuses. This is affected when the lens, the eye’s
natural lens, becomes cloudy. Cataracts can blur vision, cause hazy
sight, and impair the ability to focus properly.
The cornea and ocular surface allow light to enter the eye
and contribute to focusing images on the retina. In addition,
the cornea protects the eye and maintains visual clarity
through its transparency and curved structure.