eye dissection

Aqueous humor - clear fluid filling the area between the lens and the cornea, composed mostly of water;

helps maintain the shape of the eyeball.

Blind spot - area of the retina where the receptor cells converge to form the optic nerve.

Choroid - thin, dark sheet of tissue between the retina and the sclera.

Cones - receptor cells of the retina that are responsible for perceiving color.

Cornea - transparent covering that allows light to enter the eye; on a preserved specimen, the cornea is cloudy.

Hyaloid fossa - indention in the center of the vitreous body that supports the lens.

Iris - diaphragm that regulates the size of the pupil.

Lens - biconvex transparent structure that focuses the light coming in through the cornea and pupil.

Optic nerve - bundle of nerve cells that send signals from the eye to the brain.

Pupil - opening through which light enters the eye.

Retina - light-sensitive portion of the eye composed of receptor cells called cones and rods.

Rods - receptor cells of the retina that are responsible for perceiving difference in light intensity.

Sclera - outer covering of the eyeball; a tough, opaque sheet of connective tissue that protects inner

structures of the eyeball and helps maintain rigidity.

Tapetum - iridescent portion of the choroid tissue.

Vitreous body - the cavity between the retina and the back of the lens.

Vitreous humor - viscous fluid that fills the vitreous body; helps maintain the shape of the eyeball.

Zonula ciliaris - ligaments that suspend the lens and stretch it to focus vision.

1. Aqueous Humor

- Clear fluid between the lens and the cornea.

- Helps maintain the shape of the eyeball.

- Provides nutrients and removes waste for the cornea and lens.

2. Blind Spot

- Area on the retina where receptor cells (rods and cones) are absent.

- Location where the optic nerve exits the eye, creating a spot with no image detection.

3. Choroid

- Thin, dark sheet of tissue between the retina and sclera.

- Absorbs stray light to prevent scattering and enhances visual clarity.

- Provides nutrients to the retina.

4. Cones

- Receptor cells in the retina responsible for detecting and perceiving color.

- Function well in bright light.

5. Cornea

- Transparent, curved structure covering the front of the eye.

- Refracts (bends) light as it enters the eye, contributing to focus.

6. Hyaloid Fossa

- Depression in the vitreous body.

- Supports and stabilizes the lens.

7. Iris

- Colored diaphragm that regulates the size of the pupil.

- Controls the amount of light entering the eye.

8. Lens

- Transparent, biconvex structure behind the iris.

- Focuses light onto the retina for clear vision.

9. Optic Nerve

- Bundle of nerve fibers connecting the retina to the brain.

- Transmits visual information for processing into images.

10. Pupil

- Adjustable opening in the center of the iris.

- Allows light to enter the eye.

11. Retina

- Light-sensitive layer at the back of the eye.

- Contains photoreceptors (rods and cones) that detect light and convert it into electrical signals.

12. Rods

- Receptor cells in the retina that perceive differences in light intensity.

- Function well in low light and provide black-and-white vision.

13. Sclera

- Tough, opaque outer covering of the eyeball.

- Protects the eye and maintains its shape.

14. Tapetum

- Iridescent layer in the choroid (present in some animals but not humans).

- Enhances vision in low light by reflecting light back through the retina.

15. Vitreous Body

- Large cavity between the retina and the lens.

- Filled with vitreous humor, helping to maintain the eye's shape and optical properties.

16. Vitreous Humor

- Gel-like substance within the vitreous body.

- Helps maintain the shape of the eyeball and provides physical support to the retina.

17. Zonula Ciliaris

- Suspensory ligaments of the lens.

- Adjust the shape of the lens for focusing at different distances (accommodation).