Correct Answer - Option 1 : Long-sightedness
Learning Disability is a neurological disorder that prevents a person from learning a skill and using it effectively. Generally, occurs in childhood and is characterized by difficulty with certain skills such as reading, writing, speaking, etc.
-
'Long-sightedness' or farsightedness is a disorder caused when the cornea is less curved than normal.
- It is a condition of the eye where distant objects are seen clearly but near objects appear blurred.
- Another name for long-sightedness disorder is hyperopia. It affects the ability to focus.
- In this condition, nearby objects appear blurry as the light from them is focussed behind the retina instead of on it.
- It can be corrected by a convex lens (converging lens).
-
For example, the student who feels difficulty in reading the book on the table but reads properly the words written on the blackboard is suffering from Long-sightedness.
Thus, it is clear that the sight defect of the students in the above question is called Long-sightedness.
-
Astigmatism:
- This is an eye defect in which a blurred image is formed on the retina.
- It can be corrected by using spectacles, contact lenses, or by undergoing surgery.
-
Short-sightedness is a defect of vision due to which a person cannot see the distant objects clearly (though he can see the nearby objects clearly).
- The far point of an eye suffering from myopia is less than infinity.
- Such a person can see clearly only up to a distance of a few meters.
- Short-sightedness or near-sightedness is corrected by using spectacles containing concave lenses.
-
Color blindness is the inability or decreased ability to perceive color differences, under normal lighting conditions. It is caused due to absence of cone cells in the retina.
