When the light is very bright: The iris contracts the pupil to allow less light to enter the eye.The brain interprets these signals, and finally, processes the information so that we perceive objects as they are.Ĩ) OPTICAL NERVES: These are the nerves which take the image to the brain in the form of electrical signals. These signals are sent to the brain via the optic nerves. The light-sensitive cells get activated upon illumination and generate electrical signals. Its curvature can be adjusted with the help of ciliary muscles.ħ) CILIARY MUSCLE: These are the muscles which are attached to eye lens and can modify the shape of eye lens which leads to the variation in focal lengths. Practice REET Previous Year EVS Quiz For REET Exam Hereĥ) AQUEOUS HUMOUR: It is fluid which fills the space between cornea and eye lens.Ħ) EYE LENS: It is a convex lens made of transparent and flexible jelly like material. The pupil regulates and controls the amount of light entering the eye.Ĥ) IRIS: It is a dark muscular diaphragm that controls the size of the pupil and thus the amount of light reaching the retina. It appears black because light rays entering the pupil are either absorbed by the tissues inside the eye directly, or absorbed after diffuse reflections within the eye.

It plays an important role in focusing your vision.ģ) PUPIL: The pupil is a hole located in the centre of the iris of the eye that allows light to strike the retina. It is the clear, dome shaped surface that covers the front of the eye. The eye lens forms an inverted real image of the object on the retina.ġ) RETINA: The retina is a delicate membrane having enormous number of light-sensitive cells.Ģ) CORNEA: Light enters the eye through a thin membrane called the cornea.The eyeball is approximately spherical in shape with a diameter of about 2.3 cm.Its lens system forms an image on a light-sensitive screen called the retina. Get free Study material for REET Exam HUMAN EYE Science may be an interesting subject having and 30 questions of Science content and 30 questions of Science Pedagogy in REET and other State TET Exams. Science comprising of various branches of studies like chemistry, physical science, and life science. In many teaching exams including REET 2020 STET 2020 etc. Download Science Study Notes – हिंदी में.Download Science Study Notes – In English.DEFECTS OF VISION AND THEIR CORRECTIONS:.

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