If the receptors were at the front of the retina, the pigment cells would have to be between them and the next layer of nerve cells, in a region already packed with axons, dendrites, and synapses. As it is, the layers in front of the receptors are fairly transparent and probably do not blur the image much.
The definition of impervious is not being able to be penetrated or not able to be hurt. 1  An example of impervious is a fabric that does not allow any liquid to pass through. 2  An example of impervious is a figurine made out of indestructible material.
LINK / CITE ADD TO WORD LIST. adjective. The definition of imperious is someone or something that is domineering and demanding, without any justification or right. An example of imperious is a demand by a new house guest that you go to the store and buy him the type of drink he enjoys.entence Examples. Â» more... 1  At first he was under the tutelage of Menshikov, who wished him to marry his daughter, but he soon contrived, with the aid of the Dolgorukis and other old families, to get his imperious tutor arrested and exiled to Siberia.