The Eye in 3D
A photoreceptor organ that focuses light onto the retina, where rods and cones convert it into nerve impulses. Rotate it, zoom in, and tap each labelled part to learn its structure and function the NCERT way.
Parts of the eye
Cornea
Transparent front layer that lets light in and does most of the focusing.
Iris
Coloured muscular diaphragm that controls the size of the pupil and light entering.
Optic nerve
Carries visual nerve impulses from the retina to the brain.
Eye — the NCERT essentials
NCERT — Neural Control and Coordination. Light enters through the transparent cornea, passes the pupil (whose size is adjusted by the iris), and is focused by the lens onto the retina.
The retina carries two kinds of photoreceptor cells: rods, which contain rhodopsin and work in dim light, and cones, which are responsible for colour vision and work in bright light. The fovea (yellow spot) has the greatest density of cones and is the point of sharpest vision.
Photoreceptors convert light into nerve impulses that travel along the optic nerve to the brain, where the image is interpreted.
Did you know? The point where the optic nerve leaves the retina has no photoreceptors — the blind spot.
How the eye works — step by step
- 1
Light passes through the cornea and pupil into the eye.
- 2
The lens adjusts its curvature (accommodation) to focus light onto the retina.
- 3
Rods and cones in the retina convert the light into nerve impulses.
- 4
The optic nerve carries these impulses to the brain, which forms the image.
FAQ
Eye — frequently asked questions
What is the function of the eye?▾
Captures and focuses light for vision. Rods detect dim light; cones detect colour and bright light.
What are the main parts of the eye?▾
Key labelled parts include Cornea, Iris, Optic nerve. In the 3D model you can tap each one to read what it does.
Which NCERT chapter covers the eye for NEET?▾
NCERT — Neural Control and Coordination. Light enters through the transparent cornea, passes the pupil (whose size is adjusted by the iris), and is focused by the lens onto the retina.
Is there an interactive 3D eye model for NEET students?▾
Yes. PracticeNEET's 3D Anatomy Studio lets you rotate and zoom a real eye model and tap labelled dots to learn each part — free, in your browser, no sign-in needed to explore.
See the eye from every angle.
Open the interactive 3D model — rotate, zoom, and tap each labelled part.
Open the 3D Anatomy Studio