<prompt> Which of the following is true statement regarding human eyeCornea cut off wavelength upto 400 nmNormal eye medium will permit wavelength of 400- 700 nmEven after cataract surgery UV rays are not penetratedLens will not reflect light  <response>: Ans. b normal rye medium will permit wavelength of 400- 700 ntn Ref: yanoff 3rd ed p 383, internet sitesCornea and lens act as special filters absorbing the more energetic wavelength of the electromagnetic spectrum that can damage the retina. Cornea absorbs wavelength below 295nm where as lens absorbs strongly in the long U V B 300 - 315 and most of the UV A 315 - 400 wave-lengths. Eye light transmittance is relatively high in the 400nm-700nm range. 