COMPLEXITIES OF VISION The eye is a complex biological device. The functioning of a camera is often compared with the
There are many types of eye problems
workings of the eye, mostly since both focus light from external objects in the field of view onto a
and visual disturbances. These include
light-sensitive medium. In the case of the camera, this medium is film or an electronic sensor; in the case of the eye, it is an array of visual receptors. With this simple geometrical similarity, based on the laws of optics, the eye functions as a transducer, as does a CCD camera. Light entering the
blurred vision, halos, blind spots, floaters, and other symptoms. Blurred vision is the loss of sharpness of vision and the inability to see small details.
eye is refracted as it passes through the cornea. It then passes through the pupil (controlled by the iris) and is further refracted by the lens. The cornea and lens act together as a compound lens to project an inverted image onto the retina.
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