The document outlines the basic structures and functions of the human eye. It describes the main eye structures including the lids, cornea, iris, lens, retina, choroid, and sclera. It also details the extraocular muscles that control eye movement and their corresponding cranial nerves, as well as layers of the retina such as the pigment epithelium, rods and cones, nerve fiber layer, and optic nerve. Protection of the eyes is provided by surrounding structures like the orbit, lids, sclera, cornea, and tears.

1. Basic Structure and Function
of the Eye
Dnyaneshwar bhagwan potfode

2. the main eye structures
 Lids & conjunctiva
 Cornea
 Iris
 Lens
 Retina
 Choroid
 Sclera
 Eye muscles

3. cross section of an eye

4. eye protection
 Orbit
 Lids
 Sclera and cornea
 Lacrimal system and tears
 PROTECT THE EYES WITH
GOGGLES

5. the orbital bones

6. muscles of the eyelids

7. extraocular muscles and nerves
LATERAL RECTUS
INFERIOR RECTUS
SUPERIOR OBLIQUE
SUPERIOR RECTUS
INFERIOR OBLIQUE
MEDIAL RECTUS
OPTIC NERVE

8. eye movement: extraocular muscles
Medial rectus muscle (third cranial nerve)
Lateral rectus muscle (sixth cranial nerve)
Inferior rectus (third cranial nerve)
Superior rectus (third cranial nerve)
Superior oblique muscle (fourth cranial nerve)
Inferior oblique muscle (third cranial nerve)

9. RETINA
 Pigment epithelium layer
 Rods and cones
 Nerve fibre layer
 Optic Nerve
 Retinal blood vessels

10. RETINA
Ocular coherence tomography (OCT)
Scan of normal retina

11. 1 DISC DIAMETER
(1DD)
relative positions of lesions in the retina
disc diameters (DD)

12. OPTIC NERVES AND OCCIPITAL CORTEX OF THE BRAIN

13. Longsight (hypermetropia) & Shortsight (myopia)