The Human Eye: A Visual Explainer
A single infographic tracing how light becomes sight — from the cornea and pupil, through lens accommodation, to image formation on the retina and signal transmission to the brain.
📌 Revision Pointers
Cornea does most of the initial light-bending; the iris-pupil then regulates how much light enters
Ciliary muscles adjust the lens's curvature (accommodation) to focus light precisely onto the retina
Retina's rod and cone cells form a real, inverted image; the optic nerve carries the signal to the brain, which flips it upright
The pathway of vision, in one diagram: Cornea & Iris-Pupil → Lens (Accommodation) → Retina (Image Formed) → Optic Nerve to Brain.
💭 Conclusion
A high-yield NCERT Biology/Physics diagram — the same mechanism underlies common refractive-defect questions (myopia, hypermetropia, presbyopia, astigmatism) in UPSC Prelims.