This condition means only one pupil is dilated. Doctors sometimes call it "benign" when it's not related to any serious conditions, but it can sometimes affect young women who get migraines. The pupil usually g
A blown, or blown out, pupil is characterized by apupil that is largely dilated and unresponsive to light. When it occurs, a fixed dilated pupil may be present in one or both eyes. Typically, blown pupils are seen in response to brain damage caused by trauma or stroke, though less serio...
When one pupil is larger than the other this is known asanisocoria. What causes dilated pupils? There is a broad range of factors which cause dilated pupils. Here are some of the most common causes: Medications Both prescription and non-prescription medications can affect how our pupils respond...
Consider one of these mechanisms carried out by the pupil. The primary function of the pupil is to regulate the amount of light that falls on the eye’s lens. The expansion or contraction is an involuntary reflex, known as the pupillary reflex. You might have noticed how the black dot sh...
Cardiac muscle is the muscle tissue found in the heart, responsible for contracting to propel blood throughout the body. Cardiac muscle is also known as myocardial tissue and functions similarly to skeletal muscle. It is composed of cells called cardiomyocytes, which are responsib...
For size reference, a dilated pupil in dim lighting is 4-8 millimeters, while a normal, undilated pupil is 2-4 millimeters in bright lighting. The size of your pupils is controlled by tiny muscles from the colored part of your eye, called the iris. Your pupils naturally constrict and dil...
Shrinkage of the pupil size is normal in bright light, but when the pupil doesnotreact normally to light levels and stays small, this can be a sign of a medical problem. inflammation within the eye structures. Can lack of sleep cause constricted pupils?
Blind spots are an area in which one is not able to see or perceive. One can find a blind spot by closing one eye and looking at a photo with a plus sign on a green background on the left side and a dot on a yellow background on the right. When you move in towards this the...
Why Do Deer Stop in the Headlights? Eye Anatomy Human eye anatomy and deer eye anatomy is actually kind of similar. You’ve got a pupil that lets in light to the eye. It gets reflected onto yourretina, which is what sends all the visual input to the brain. Deer eyes are quite simila...
The Earth's oceans used to be green — and could one day turn purple, scientists say Animals with unusual eye colors fall on the same color continuum, Fromer said. It's not uncommon for cats to have bright green eyes.(Image credit: Maciej Bledowski Shutterstock.com) ...