In conjunctivitis (pink eyes) the outermost layer of conjunctive tums red due to viral infection the rod cells are sensitive to dim light but do not r

• In conjunctivitis (pink eyes) the outermost layer of conjunctive tums red due to viral infection the rod cells are sensitive to dim light but do not respond to colour. They contain the pigment rthodopsin
• The cones are sensitive to bright light and are responsible for colour vision. They contain the pigment iodopsin
• Yellow spot is the area of the best vision.
• Blind spot is the area of o vision
• The image on the retina is inverted and real
• The word pupil is derived from the Latin word “pupilla” meaning a “doll”
• All monkeys/apes and particularly humans have the capacity to perceive depth or the relative distance of the objects
• The term agnosia means a failure to recognize.
• Anosmia means loss of sense of smell
• Abnormal enlargement of pupil is called Mydriasis.
• Most domestic animals and sharks alck color vision
• Most birds have only day vision as their retina has mainly cones
• Snakes have no ear
• In proportion to body size, deer presumably possesses largest eyes among vertebrates