Our eyes
The human eyes are a highly developed sensory organ. Healthy eyes can perceive information in the range of visible light. With the eyes we can orient ourselves in the environment.
Aug compared with a camera
The cornea and the lens correspond to the objective and focus the incidence of light on the center of vision. The iris corresponds to the diaphragm and regulates the incidence of light into the eye. The retina corresponds to the film.
Anatomy of the human eye
Eye lens (lat. Lens crystallina)
The lens of the eye focuses the light entering through the pupil. With approximately 10 to 20 diopters of the eye's total refractive power (of about 63 diopters), the lens of the eye - along with the cornea ...
Lenticular bands (lat. Zonula ciliaris)
The lens ligaments - also called zonular fibers - are elastic fibers arranged in a spoke-like pattern around the capsule in which the lens of the eye is located. They hold the lens in position ...
External eye muscles
The external eye muscles are responsible for the movements of the eyes, i.e. changing the direction of gaze. They attach to different parts of the eyeball. Humans have four straight and two ...
Sclera (lat. Sclera) in the eye
The sclera forms the outermost layer of the eye, it is "the white of the eye" that can be seen from the outside around the pupil and iris. It is therefore also called ...
Choroid (lat. Choroidea)
The choroid is located between the sclera and cornea and extends over the entire posterior part of the eyeball. It has a high density of blood vessels and supplies the retina with ...
Blood vessels in the eye
While the retina is supplied by the choroid from one side, blood vessels also lie directly on the back of the eye - the retina. This network of vessels comes ...
Vitreous body (lat. Corpus vitreum)
The vitreous body fills most of the interior of the eye and thus sits between the lens and the retina. Consequently, light entering through the pupil and lens must pass through the vitreous before ...
Retina (lat. Retina)
The retina is responsible for converting light entering the eye into nerve impluses. The retina is very sensitive to light and lines the inside of the eye. It is the largest retina in the world with approximately 127 ...
Yellow spot (lat. Macula lutea) in the eye
The yellow spot is located in the center of the retina and is only about three to five millimeters in size. It gets its name from a yellow pigment that is found on this spot. ...