Your Eye Cares
Different kinds of light sensitive organs are found in a variety of organisms. The simplest eyes do nothing but detect whether the surroundings are light or dark, while more complex eyes can distinguish shapes and colors. The visual fields of some such complex eyes largely overlap, to allow better depth perception, as in humans; and others are placed so as to minimize the overlap, such as in rabbits and chameleons.
Welcome to Your Eye Care!
The size of the pupil is actively adjusted by the circular and radial muscles to maintain a relatively constant level of light entering, READ ON...
Eye Care Knowledge Base
Rods and cones are both photosensitive, but respond differently to different frequencies of light. The vitreous gel undergoes liquefaction (posterior vitreous detachment or PVD) and its opacities—visible as floaters—gradually increase in number. Vergence movements are closely connected to accommodation of the eye. The movements of the eye are no exception, but they have special advantages not shared by skeletal muscles and joints, and so are considerably different. The narrow beam of sharp vision is easy to test by putting a fingertip
This area is called the fovea, and covers about 2 degrees of visual angle in people. These eyespots could only sense ambient brightness: they could distinguish light and dark, but not the direction of the lightsource. At the conclusion of an eye examination, an eye doctor may provide the patient with an eyeglass prescription for corrective lenses.With aging a prominent white ring develops in the periphery
diagram of parts of the eye Online
Latest diagram of parts of the eye News
Diagram of the Eye [NEI Health Information]
Drag the magnifying glass to explore the eye diagram. Click the targets to see definitions for parts of the eye.
Lesson Tutor: Practice worksheet : parts of the eye.
4) 1. Label the diagram to show the following parts of the eye: iris retina optic nerve aqueous humor: lens cornea vitreous humor sclera ...
Lasik Surgery