Dilating eyedrops can keep eyes dilated for up to several hours, according to the American Academy of Ophthalmology. The time varies depending on the individual, their eye color and the number of drops administered.Know More
Dilating eyedrops are used to help improve the efficacy of an eye exam by allowing the doctor to examine the eye structures, including the retina and the optic nerve, notes About.com.
People with light-colored eyes can expect to dilate faster because they are more sensitive to the eyedrops. Since the effects of dilated eyes include blurry vision and sensitivity to light, doctors encourage dilated patients to temporarily wear sunglasses to reduce glare.Learn more about Vision
Being unable to focus can be a symptom of eye fatigue or strain, which is commonly associated with reading or being in front of a computer for extended periods, states WebMD. Some other symptoms of eye strain can be eye irritation and light sensitivity.Full Answer >
Astigmatism is a condition that causes blurred vision when the lens or cornea of an eye has an irregular surface contour, according to Mayo Clinic. Rather than having a consistently smooth curvature, an astigmatic lens or cornea has abnormal curves and flattened areas, changing how the eye processes light.Full Answer >
The appearance of black floating objects in the eye are usually shadows cast on the retina, caused by clumping in the liquid within the eye, known as the vitreous humor. However, eye floaters could signify serious conditions.Full Answer >
Stress can be one of the causes of bloodshot eyes, though there are specific causes of morning and evening bloodshot eyes such as sleep deprivation, overuse of contact lenses, alcohol and food/diet. Bloodshot eyes will occur whenever the blood vessels in the eyes become dilated or swollen, according to The New York Times.Full Answer >