Blockage of a retinal artery by a thrombus (blood clot) typically affects only one eye, causing sudden blindness or loss of part of the visual field.
It requires urgent treatment, which may include eye massage, draining fluid from the eye, or medication; even with treatment, loss of vision is usually permanent.
Blockage of a retinal vein also usually affects only one eye and tends to cause deterioration of vision over several days, although sometimes visual loss may occur suddenly.
Treatment may involve medication injected into the eye or laser surgery.
Even with treatment, there is likely to be some permanent loss of vision.

Othere related diseases

PTOSIS
Ptosis is abnormal drooping of the upper eyelid due to weakness of the muscle that normally keeps the eyelid raised. The sagging lid may partly or totally close...

RETINAL BLOOD VESSEL THROMBOSI
Blockage of a retinal artery by a thrombus (blood clot) typically affects only one eye, causing sudden blindness or loss of part of the visual field.
It req...

RETINAL DETACHMENT
Vitreous detachment In retinal detachment, the retina separates from the back of the eye. It may follow an eye injury, but usually occurs spontaneously. Typical...

RUPTURED EARDRUM
Also known as a perforated eardrum, a ruptured eardrum is a hole or tear in the eardrum, typically producing sudden, intense pain, a bloodstained discharge from...

SENSORINEURAL HEARING LOSS
Sensorineural hearing loss is hearing loss caused by damage to sensory nerves in the ear or the nerve that carries auditory information to the brain. It is usua...

STYE
A stye is a small, pus-filled swelling at the base of an eyelash, which may cause pain when blinking. It is usually due to a bacterial infection.
A stye typ...

SUBCONJUNCTIVAL HEMORRHAGE
A subconjunctival hemorrhage is bleeding under the conjunctiva (the clear membrane covering the white of the eye), producing a dark red area over the white of t...

TINNITUS
Tinnitus is the term for noises such as buzzing, ringing, or hissing that originate within the ear rather than externally. It is commonly associated with hearin...