Have you ever seen a temporary black spot in your vision? How about jagged white lines? Something that looks like heat waves shimmering in your peripheral vision?

If you have, you may have been experiencing what is known as an ocular migraine. Ocular migraines occur when blood vessels spasm in the visual center of the brain (the occipital lobe) or the retina.

They can take on several different symptoms but typically last from a few minutes to an hour. They can take on either positive or negative visual symptoms, meaning they can produce what looks like a black blocked-out area in your vision (negative symptom), or they can produce visual symptoms that you see but know aren’t really there, like heat waves or jagged white lines that look almost like lightning streaks (positive symptoms).

Some people do get a headache after the visual symptoms but most do not. They get the visual symptoms, which resolve on their own in under an hour, and then generally just feel slightly out...

Not everyone understands the importance of sunglasses when the weather turns cold.

Polarized sunglasses are usually associated with Summer, but in some ways it is even more important to wear protective glasses during the Winter.

It’s getting to be that time of year when the sun sits at a much different angle, and its rays impact our eyes and skin at a lower position. This translates to an increase in the exposure of harmful UV rays, especially if we are not wearing the proper sunglasses as protection.

Polarized sunglasses, which are much different than the older dye-tinted lenses, are both anti-reflective and UV resistant. A good-quality polarized sunglass lens will protect you from the entire UV spectrum. This not only preserves your vision, but it also protects the skin around the eyes, which is thought to have a much higher rate of susceptibility to skin cancer.

Snow poses another issue that can be countered by polarized sunglasses.

Snow on the ground tends to act...