Iris in the vertebrate eye functions to: Receptors Mcqs September 18, 2019 BILAL KHATTAK0 A.Move the lens B.Alter the diameter of pupil C.Close the eye lids in bright light D.Secrete the vitreous humor Related Mcqs: Main functions of rods and cones in retina of vertebrate eye are: In a vertebrate eye the chief function of rods and cones is that: Focal length of lens is controlled by: If a light source in front of our eyes suddenly becomes bright then: Blind spot in the vertebrates eye is located: Oxyntic cells are found in: GLOOMY: Which of the following structures in our eye are not derived from ectoderm: Rods of cones in the vertebrate eyed differ in one of the following respects: Cavity of vitreous humour is: