What is the refractive device of the eye?

The refractive device of the eye is a complex system, including cornea, lens, aqueous humor and vitreous body.

1. Corneal

cornea is the most transparent tissue in the front of the eye, which can focus the external light on the retina and form a clear image.

2. Lens

lens is elastic transparent tissue, which can become flat and convex on its own. This change can adjust the refractive power and thus adjust the focal length of the eye.

3. Aqueous

humor fills between cornea and lens, and can also adjust refractive power.

4.

Vitreohyaloid is a transparent colloidal substance in the eye, filling between lens and retina, which has little effect on the refractive power of the eye.