Vitreous, Retina, & Uvea

Vitreous, Retina and UEVA

The vitreous is a clear, gel-like substance that fills the space between the lens and the retina in the back of the eye. It helps maintain the eye’s shape, supports the retina by exerting gentle pressure, and aids in transmitting light to the retina. The vitreous also acts as a shock absorber, protecting the eye from sudden impacts.

Vitreous

Definition	Components	Causes	Symptoms	Treatment
A clear, gel-like substance filling the eye between the lens and retina.	Composed mainly of water (99%), collagen, and hyaluronic acid	•Aging •Trauma •Diabetic retinopathy Retinal tears	•Floaters •Flashes of light •Blurred vision	• Observation • Laser therapy • Vitrectomy (surgical removal of the vitreous)

Common Disorders from Vitreous

Posterior Vitreous Detachment (PVD)
Vitreous Hemorrhage
Vitreoretinal Interface Disorders

Retina

Definition	Components	Causes	Symptoms	Treatment
The thin layer of tissue at the back of the eye that detects light and sends visual signals to the brain.	Contains photoreceptors (rods and cones), bipolar cells, ganglion cells, and layers of supporting cells	• Retinal detachment • Diabetic retinopathy • Macular degeneration • Retinal vein occlusion.	• Sudden vision loss • Floaters • Distorted vision • Dark spots<br	• Observation • Laser therapy • Vitrectomy (surgical removal of the vitreous)

Common Disorders from Retina

Diabetic Retinopathy
Age-Related Macular Degeneration (AMD)
Retinal Detachment
Retinitis Pigmentosa

Uvea

Definition	Components	Causes	Symptoms	Treatment
The middle layer of the eye, comprising the iris, ciliary body, and choroid, supplies the majority of blood to the retina.	Iris: Regulates the amount of light entering the eye by adjusting the sise of the pupil. Ciliary Body: Produces aqueous humor and houses the ciliary muscle, which adjusts the lens shape for focusing. Choroid: Contains blood vessels that deliver nutrients and oxygen to the retina.	• Uveitis (inflammation) • Infection • Autoimmune diseases • Trauma	• Eye pain • Redness • Blurred vision • Light sensitivity	• Corticosteroids • Immunosuppressive drugs • Antibiotics (for infection • Surgery in severe cases.