the eye in biology

They are the visual sensory organs. They are equipped with the photoreceptors called the rods and cones. In humans, there is a pair of eyes that are directed forward and give binocular vision. The eyes are situated in the eye sockets or orbits of the skull. Human ..

Each eye in man is protected by two eyelids - upper and lower. The upper lid moves and covers the eye at regular intervals. This is called blinking. This action protects the eye from foreign particles. In certain animals, like the fishes and frogs, there is a third ey..

Sense Organs - Eyes - There are five sense organs in humans - eyes, ears, nose, tongue and skin. Sensation is the conscious or unconscious awareness of external or internal stimuli. Sensing external environment is extroception. Example: Reading a page Sensing of bodys internal c..

There are five sense organs in humans - eyes, ears, nose, tongue and skin. Sensation is the conscious or unconscious awareness of external or internal stimuli. Sensing external environment is extroception. Example: Reading a page Sensing of bodys internal condition and position is introce..

It is the most widely used instrument in the field of biology. It is a device meant for magnifying biological objects that cannot be seen with the naked human eye. It has two sets of lenses - objective and ocular - that magnify an object in two steps. A compound micros..

A pair of that enclose the eyes..

Each eye is a spherical structure that comprises of a lens and a three-layered wall. ..

There are certain structures associated with the eyes and carry out, mainly, the function of protection. These structures ar..

It is the posterior, larger chamber between the lens and retina. It is filled with a semi-solid substance called the vitreous humour. Both the aqueous and vitreous humour serve to refract the light, give shape to the eyes, support the lens and maintain the intra-ocular pressure to keep t..

They are found in the EEGs of nearly all normal individuals when awake with eyes closed and in the resting stage. These waves disappear entirely during slee..