<prompt> Normal axial length of the eye -18mm20 mm24mm28 mm  <response>: Ans. is c i.e., 24 mm o The length of the eyeball is approximately 24 mm, So the distances from the cornea crystalline lens to the retina and the focal length of optical rays focused by the comeacrystalline lens propagating in the vitreous humor and imaging on the retina, are also about 24 mm.Dimensiosn of an adult eyeAnteroposterior diameter Length24 mmHorizontal diameter23-5mmVertical diameter23 mmCircumference75 mmVolume6-5 mlWeight7 gm 