Why is mosaic vision with less resolution seen in cockroaches?
Answers
As a result of so many different units cockroach revives saveral images at a time and therefore it creates a mosaic vision which is with less resolution but high sensitivity.
•Cockroaches have compound eye which is made up of upto 2000 units of small eyes called as ommatidia.
•As a result of so many different units cockroach revives saveral images at a time and therefore it creates a mosaic vision which is with less resolution but high sensitivity.
•The eyes in cockroach are large, sessile, paired, bean-shaped and present on either sideof head. These are compound in nature. Each compound eye consists of a large numberof visual elements called ommatidia. Each ommatidium is composed of a diopteric region and reticular (receptor) region. It iscapable of producing a separate image of a small part of 'object seen. Thus, the image of the object viewed consists of several pieces and hence known as mosaic image. From the inner end of each ommatidium, fine nerve fibers arise, all of which combine to form one optic nerve connected to the brain.