Many individuals also report being sensitive to bright sunlight and prefer dim lighting while indoors. The drive behind this usually relates to a small group of muscles that surround the eyes. These muscles, known as CMP trigger points, become so tense and clinched that they prevent adequate circulation around this delicate area. This tension then causes further aggravation. When these muscles do not function well, this causes the eyes to become overly dry or on the opposite end, to tear up often.
There are various triggers that set off this sensitivity. These include:
- A sudden change in environmental temperature like a cold draft; a muscle’s reflex reaction to cold is to flex
- The body’s reaction to injury similar to “flinching”
A person’s sensitivity to light often prompts him or her to wear sunglasses even on cloudy days.
On the other hand, some healthcare providers might blame this condition on medication whose side effects include changes in vision. While this might be likely, some people who have fibromyalgia are not taking medications that would affect the eyes. Also, a nominal amount of research points towards muscle fatigue as a cause.