What Is Chemosis?
Chemosis is an eye condition that affects the conjunctiva (the tissue that lines the inside of the eyelid) and the eye surface. It causes irritation and swelling. It may also be defined as an edema of the conjunctiva. It may look like a blister or jelly-like substance covering the sclera (the white of the eye). […]
Anisocoria: Causes, Symptoms, Diagnosis & Treatment Options
With anisocoria, one pupil is significantly larger or smaller than the other. This condition affects approximately 20 percent of the population. In the majority of cases, anisocoria is not dangerous and does not signal any underlying eye or health issues. However, in some cases, anisocoria may indicate a more serious condition that requires medical intervention. […]
Papilledema (Swelling of the Optic Nerve): Is It Dangerous?
Swelling of the optic nerve or papilledema is dangerous. It occurs when a person suffers an injury or has an underlying condition that is life-threatening. What Is Papilledema? To define papilledema, you first have to understand how it develops and affects the optic nerve. The optic nerve represents the second cranial nerve (CN II). This […]
Chalazion vs. Stye: What Are the Differences Between the Two?
A chalazion and a stye are both lumps that appear on the eyelid. It can be difficult to tell the difference between the two since they often look similar. Both a chalazion and style are eyelid inflammations. A chalazion often develops after a stye. The chalazion, also called a meibomian cyst, does not develop as […]
Are Styes Contagious? Prevention & Treatment Options
Styes are usually not contagious. Styes are red bumps (hordeolum) found near the edge of the eyelid. They often look like pimples and can be unsightly, painful, and annoying. They may develop due to oil gland blockages, stress, hormonal changes, and other causes. Good hygiene is the best prevention method against styes. They will normally […]
Kaleidoscope Vision: Causes, Symptoms & Treatment Options
Kaleidoscope vision is considered a temporary distortion of vision that results in blurry, brightly colored, and broken up images — similar to how things appear when looking through a kaleidoscope. Kaleidoscope vision is most commonly caused by migraine headaches. When vision issues accompany migraines, they are known as ocular or retinal migraines. Experts believe kaleidoscope […]
What Do People With Astigmatism See at Night?
At night, people with astigmatism may see halos or streaks around lights. They may have distorted vision at night, making it difficult to drive. Astigmatism is both a common and treatable eye condition that results in blurred vision or other forms of vision distortion. According to the American Academy of Ophthalmology, one in three people […]
Photoreceptors: What They Are & What They Do
Photoreceptors are dedicated cells within the retina that are responsible for specific types of vision. Photoreceptors allow for color vision and the ability to see at night. They consist of rods and cones, which are responsible for converting light into electrical signs that are decoded and enable visual processing. Types of Photoreceptors There are two […]
Aphakia: Symptoms, Causes & Treatment
Aphakia is a condition in which there is no lens within the eye. The lens is the clear, ovular-shaped structure located behind the colored part of the eye (the iris) and the pupil. The lens plays a role in focusing light on the retina. What Aphakic Means If you are aphakic, you will experience an […]
Burning Eyes: Understanding the Causes & Treatment Options
A stinging or irritating sensation in the eyes is often referred to as burning eyes. Many different factors can result in burning eyes, including allergies, weather-related issues, various diseases, and exposure to an irritating substance. The levels of pain and discomfort can vary greatly among people with burning eyes. Mild cases of burning eyes are […]
Iritis: Causes, Symptoms, Diagnosis & Treatment Options
Iritis is when the eye’s iris (the colored portion of the eye) becomes inflamed. The eye’s uvea contains the iris and makes up the middle portion of the eye. Uveitis is when any part of the uvea is inflamed or swollen. Inflammation and swelling of the iris can be caused by a variety of reasons, […]
Why Does Your Eye Hurt When You Blink?
There are several reasons why one or both eyes can hurt when you blink. The most common causes include dry or irritated eyes, sinus infections, a stye, or conjunctivitis (pink eye). More serious conditions that can lead to eye pain from blinking include optic neuritis and glaucoma. The most common ways to relieve eye pain […]