Mark your Calendars!!! On Monday, Aug. 21, 2017, a solar eclipse will be visible across the entire continental United States.

A solar eclipse occurs when the moon blocks any part of the sun, and with this one, all of North America will experience at least a partial eclipse lasting 2 to 3 hours.

A lucky few million people along a 70-mile-wide path from Oregon to South Carolina will experience a brief total eclipse when the moon completely blocks the sun for up to 2 minutes. For that 2 minutes or so it will look like nighttime along that path.

This total eclipse will make the solar corona visible, and stars and the planets may also be visible during this time.

But looking directly at the sun before it is covered is unsafe. Although there is a limited chance of eye damage if you are in the proper area during the total eclipse it is not worth the risk of retinal damage to even take a quick look at the eclipse if it is not “total”.

A large part of the country is not along...

With the legalization of medical marijuana in 29 states as of April 2017, the question of whether marijuana is a good treatment for glaucoma has resurfaced.

Glaucoma is a common eye disease that affects the optic nerve and results in loss of peripheral vision. The treatment for glaucoma is to lower the pressure - intraocular pressure - inside the eye. This can be accomplished by laser, eye drops, or surgery.

The idea that marijuana can be used to treat glaucoma dates back to the 1970s. Smoking marijuana does lower intraocular pressure but the effect lasts only 3-4 hours. In order for marijuana to be an effective treatment, a person would have to smoke marijuana every 3 hours. Since marijuana also has psychoactive effects, consistently smoking it could prevent a person from performing at maximum mental capacity, and frequent use can cause problems with short-term memory.

Marijuana not only lowers intraocular pressure but also blood pressure and blood flow throughout the...