Question

discuss related to Eyes 1myopia 2hypromyopia​

Answer 1

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$\huge {\bf{\red{\fbox{Myopia}}}}$

A human eye is myopic if it can see the near objects clearly but unable to see far off objects or distant objects clearly .

$\textbf{Causes }$

(i) Due to elongation of eye ball

(ii) Due to the excessive curvature of the cornea .

$\texbf{Correction }$

☆ It can be corrected by using concave lens of suitable focal length .

$\huge{\bf{\red {\fbox{Hypermetropia}}}}$

A human eye which can see far off objects or distant objects clearly but cannot see the near objects clearly is said to be suffered with a defect known as Long sightedness or far sightedness or hypermetropia .

$\textbf{Causes }$

(i) Size of eye ball becomes too small

(ii) The increase in the focal length of eye lens .

$\textbf{Correction}$

This defect can be corrected by using a convex of suitable focal length .