Acute angle-closure glaucoma is characterized by a sudden increase in intraocular pressure, causing severe eye pain, blurred vision, halos around lights, and nausea and vomiting.

Uveitis is often caused by an autoimmune disorder, where the body's immune system mistakenly attacks the eye tissues.

Retinal detachment is characterized by the separation of the retina from the underlying choroid, causing floaters and flashes of light, blurred vision, loss of peripheral vision, and sometimes eye pain.

The immediate treatment for a corneal abrasion is to apply an eye patch to protect the cornea and promote healing.

Blepharitis, an inflammation of the eyelid margins, is a common risk factor for developing a stye.

Diabetic retinopathy, a complication of diabetes, is the most common cause of sudden vision loss in diabetic patients.

Optic neuritis, an inflammation of the optic nerve, is characterized by painful eye movements, blurred vision, loss of color vision, and sometimes double vision.

The primary treatment for a chemical burn to the eye is to immediately flush the eye with copious amounts of water to dilute and remove the chemical.

Episcleritis, an inflammation of the episclera (the white outer layer of the eye), is characterized by redness and irritation of the eye, but typically does not cause pain, tenderness, blurred vision, or floaters and flashes of light.

Juvenile idiopathic arthritis, a chronic inflammatory condition, is the most common cause of uveitis in children.

Orbital cellulitis, an infection of the tissues surrounding the eye, is characterized by proptosis (bulging of the eye), pain and tenderness, fever, and sometimes double vision.

The treatment for a corneal ulcer typically involves antibiotic eye drops or ointment to combat the infection.

A subconjunctival hemorrhage, a rupture of a small blood vessel in the conjunctiva (the clear outer layer of the eye), is characterized by redness of the eye, but typically does not cause pain, tenderness, blurred vision, or floaters and flashes of light.

The primary treatment for a detached retina is vitrectomy, a surgical procedure to remove the vitreous humor (the gel-like substance filling the eye) and reattach the retina.

Sun exposure is a major risk factor for developing a pinguecula, a yellowish bump on the conjunctiva (the clear outer layer of the eye).