- Eye injury
There are many types of eye injury, and symptoms include eye pain, burning, irritation, bleeding, and more.
- Normal variation
Normal variation, or anisocoria, is unequal pupil size, and can cause a droopy eyelid or double vision.
- Cocaine abuse
Cocaine abuse occurs when a person continues using it despite the social and health problems caused by it.
- Medication reaction or side-effect
Medication side effects include nausea, vomiting, stomach upset, weakness, dizziness, seizures, and more.
- Stroke
A stroke occurs when blood and oxygen to the brain are cut off, and causes numbness, confusion, and more.
- Methamphetamine use
Methamphetamine use causes increased blood pressure, rapid heart rate, enlarged pupils, sweating, and more.
- Horner's syndrome
Horner syndrome is a rare condition that can cause a drooping eyelid, decreased sweating, and a small pupil.
- Brain injury
Brain injuries can cause problems with memory, attention, sight, language, movement, and mood.
- Adie's pupil
Adie's pupil is a rare disorder usually affecting only one eye, causing blurry or distorted vision in the eye.
- Brain tumor
Primary brain tumors are often benign but can cause seizures, ongoing headaches, or loss of coordination.