blurred vision and double vision

The range of distance over which the eye can see clearly is called its range of vision. The range of vision of a normal healthy eye is from infinity to 25cm from the eye. The terms like power of accommodation, focusing, least distance of distinct vision tell us that th..

Range of Vision - The range of distance over which the eye can see clearly is called its range of vision. The range of vision of a normal healthy eye is from infinity to 25cm from the eye. The terms like power of accommodation, focusing, least distance of distinct ..

The eye works on the same principle as that of the camera. The light rays from the object pass through the conjuctiva, cornea, aqueous humour, lens and vitreous humour in that order. All these structures refract the light such that it falls on the retina. This is called focussing. Maximum focussing..

Defects of Vision - A normal eye can see all objects over a wide range of distances i.e., from 25 cm to infinity. But due to certain abnormalities the eye is not able see objects over such a wide range of distances and such an eye is said to be defective. Some of the defects of visio..

A normal eye can see all objects over a wide range of distances i.e., from 25 cm to infinity. But due to certain abnormalities the eye is not able see objects over such a wide range of distances and such an eye is said to be defective. Some of the defects of vision are Hypermetropia or..

The light rays from the object pass through the conjuctiva, cornea, aqueous humour, lens and vitreous humour in that order. All these structures refract the light such that it falls on the retina. This is called focussing. Maximum focussing is done by the cornea and the lens. The light then f..

A normal eye can see all objects over a wide range of distances i.e., from 25 cm to infini..

In man, the eyes are frontal and thus the vision is binocular. This means that the image finally perceived is the result of the information received from both the eyes. Binocular vision results in stereoscopic vision that gives a 3-dimensional image. Thus, this capabi..

Refraction of Light..

Near point or least distance of distinct vision is the point nearest to the eye at which an object is visible distinctly. For a normal eye the least distance of distinct vision is about 25 centimetres. However, it varies with age of the person. For example, for infants it is o..