1 A chiropractor may want to visit your horse more than once. 2  Depending on the problem, additional visits may be necessary every week or month. 3  Acupuncture and injections can cost anywhere from $15 to $55 extra. 4  If a chiropractor session does not help your horse, x-rays or additional testing may be recommended. Depending on the problem, additional visits may be necessary every week or month. 2  Acupuncture and injections can cost anywhere from $15 to $55 extra. 3  If a chiropractor session does not help your horse, x-rays or additional testing may be recommended.
Photic retinopathy. Photic retinopathy is damage to the eye's retina, particularly the macula, from prolonged exposure to solar radiation or other bright light, e.g. lasers or arc welders. The term includes solar, laser, and welder's retinopathy and is synonymous with retinal phototoxicity.
Nothing causes instant damage. (See Into the Sun for an interesting take on it) The question then comes, how much exposure will damage your eyes. The Straight Dope has a very good article on this: Can laser pointers damage your eyes? As does Scientific American: Can a pocket laser damage the eye? The big take is that (until recently) the most powerful laser pointers available would cause you to blink before it would do damage to your eyes (about 0.25s). Sadly, that's no longer the case.