The Human Eye and the Colourful World Mind Map

Accommodation is the ability of the eye lens to change its curvature so that objects at different distances are seen clearly.

In answers, mention ciliary muscles, lens curvature, and focal length change together. That combination earns full concept credit.

The near point is the nearest distance at which an object can be seen clearly without strain.

Remember the standard near point of a normal adult eye as 25 cm unless the question states otherwise.

Myopia is a defect in which a person sees nearby objects clearly but distant objects appear blurred.

In correction answers, mention concave lens, diverging rays, and image shifting to the retina.

Hypermetropia is a defect in which a person sees distant objects clearly but nearby objects appear blurred.

For hypermetropia, always mention behind the retina and the use of a convex lens.

Presbyopia is an age-related defect in which the power of accommodation decreases and near vision becomes difficult.

Mention age, reduced accommodation, and the shifting near point when you answer presbyopia questions.