Choroid is a dark brown membrane with rich blood vessels and pigments, which lies between retina and sclera.

Choroid usually functions as below.

• ◼︎ Nutritional supply to retina: Choroid has rich blood vessels, which plays a role in oxygen and nutrition supply.
• ◼︎ Absorb light: This pigmented membrane prevent light go into the area other than the pupil to guarantee the vision quality.
• ◼︎ Remove the waste: play a role in transporting the waste products in eyeballs.

• ◼︎ Nutritional supply to retina: Choroid has rich blood vessels, which plays a role in oxygen and nutrition supply.
• ◼︎ Absorb light: This pigmented membrane prevent light go into the area other than the pupil to guarantee the vision quality.
• ◼︎ Remove the waste: play a role in transporting the waste products in eyeballs.

If the choroid is damaged, it will cause big influence to your vision.
The representative diseases are as follow:

• ◼︎ Aged macular degeneration
• ◼︎ Choroiditis
• ◼︎ Myopic choroidal atrophy

• ◼︎ Aged macular degeneration
• ◼︎ Choroiditis
• ◼︎ Myopic choroidal atrophy

Choroid is a very important tissue to supply the nutrition and keep the optical stability.