The substance present in the choroid is:

The sensation of vision in the retina is carried to the brain by

If a human had only one eye,then:

An imaginary line joining the optical centre of the eye lens and the yellow point is called as

$A$ man can see only between $75 \, cm$ and $100 \, cm$. The power of the lens required to correct the near point will be:

$A$ man can see objects clearly between $15 \ cm$ and $30 \ cm$. He uses a lens to see far objects. Due to the lens used,the new near point will be at........$cm$.