Accommodation of the eye

Accommodation of the eye

Accommodation of the eye is the ability of the eye lens to change its focal length by changing its radius of curvature.

In near vision contraction of ciliary muscels causes decreased tension to the suspensory ligament and causes bulging of the anterior curvature of the eye.

To cause distant vision ciliary muscles are relaxed and causes increased tension of the suspensory ligament which flattens the anterior curvature of the eye.

Presbyopia

Presbyopia is the gradual loss in the power of accommodation of eye lens due to aging.

Refraction errors

Refraction errors is the Inability of the eye lens to adjust its focal length.

Myopia (short sight)

Due to abnormal increase in the anterior – posterior diameter, image fall just before the retina

Hypermetropia (long sight)

Due to reduction in the anterior-posterior diameter, image fall just behind the retina

Astigmatism

No common point of focus due to difference in the radius of curvature of cornea, overlapping of images.