<prompt> Gonioscopy is used forAnterior chamber anglePosterior chamber angleAnterior surface of lensPosterior chamber  <response>: Gonioscopy describes the use of a goniolens in conjunction with a slit lamp or operating microscope to gain a view of the iridocorneal angle, or the anatomical angle formed between the eye;s cornea and iris. Reference: AK Khurana 7th Edition 