1. Explain the structure and working of human eye with suitable diagram and also explain its function parts.
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so the structure of homan eye....
the main parts
- cornea
- iris
- pupil
- aqueous
- humor
- lens
- vitreous humor
- retina
- optic nerve
the evolution of vision and the variety of eyes found in both humans and animals.
The cornea is a transparent structure found in the very front of the eye that helps to focus incoming light. Situated behind the pupil is a colorless, transparent structure called the crystalline lens. A clear fluid called the aqueous humor fills the space between the cornea and the iris.
working of human eye..
ur vision allows us to be aware of our surroundings. Eighty per cent of everything we learn is through our sight.
Your eye works in a similar way to a camera. When you look at an object, light reflected from the object enters the eyes through the pupil and is focused through the optical components within the eye.
The front of the eye is made of the cornea, iris, pupil and lens, and focuses the image onto the retina. The retina is the light sensitive membrane that covers the back of the eye. This membrane consists of millions of nerve cells which gather together behind the eye to form a large nerve called the optic nerve.
Iris - thin circular structure at the front of the eye. The iris is the coloured part of the eye (blue, brown or green). Pupil - the opening in the iris - the circular black centre. Lens - behind the iris - a transparent, biconvex structure. Posterior chamber – the back part of the eye’s interior - filled with watery fluid known as aqueous humour. Ciliary body and muscle – part of the eye that produces aqueous humour. Posterior chamber – back part of the eye’s interior, the aqueous passes into the posterior chamber and then flows forward through the pupil into the anterior chamber of the eye. Suspensory ligament of lens
Made of many working parts, the human eye functions much like a digital camera. Here's how it works. Light enters the eye through the cornea, the clear front surface of the eye, which acts like a camera lens. The iris works much like the diaphragm of a camera--controlling how much light reaches the back of the eye.
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