Studies have shown that the eye needs at least five hours of sleep per night to properly replenish. Without that time, eyes cannot work at their full potential. One common side effect of lack of sleep is eye spasms. Eye spasms are defined as involuntary eye twitches that occur when you have a spasm in your eyelid. These involuntary spasms are known as myokymia. Eye spasms should not be painful or do damage to your vision; however, they can be very aggravating and disruptive. Avoid eye spasms by making sure you get an adequate amount of sleep per night.
Over time, lack of sleep can lead to serious ramifications on your vision including popped blood vessels due to eye strain. Additionally, a shortage of sleep can cause dry eye, a condition when tears do not adequately lubricate your eyes. When dry eye sets in you can experience some pain, light sensitivity, itching, redness or even blurred vision.