This is a grade school topic and can be answered by the search button. Your retinas will be damaged. You can look at an eclipse but you had better be wearing a certified welding mask.
Yes, 20/400 is bad. However, it's unlikely that it's related to your exposure to an eclipse/welding torches. Problems with visual acuity are usually related to the cornea and lens rather than the retina. These are the two things that really refract and focus the light in your eye. Accordingly, your refractive problem (the 20/400 vision) could be corrected with glasses/contacts/LASIK (theoretically anyway). If you had retinal problems from your numerous 'incidents', then you would have a different set of problems, such as blind/dark spots, decreased contrast sensitivity, et cetera.
Sweet!!! I'll be celebrating my 47th Birthday(2 Days Late) at Cedar Point in Ohio to see the full-e!
Oifish
Senior member
- Dec 21, 2003
- 465
- 1
- 81
Lookin at the sun during an eclipse and looking at it normally will do the same amount of damage. It's just because when the sun is in an eclipse it's is "eaiser" to look at it for longer amounts of time. There are no weird "rays" and junk that supposedly blinds you. It's just the normal bombardment of UV rays like always.
Originally posted by: CycloWizard
That doesn't make sense either. There is no reason radiation should induce a dioptric change, myopic or otherwise. 0.125 diopters is totally negligible. My prescription is -4.25 diopters. If a myopic shift of 0.125 diopters was the downside of looking at an eclipse, I doubt anyone would not look. So, just admit that you're BSing and step away from the keyboard.
Well, maybe it wasn't that alone that made my eyes worse, but I'm sure that was a factor. 0.125 is pretty bad already really. The world sure looks way different when I put my contacts on. Are you sure looking at the sun won't make you shortsighted?!
Slappy00
Golden Member
- Jun 17, 2002
- 1,820
- 4
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Since we are talking about eye damage I rememeber this girl who was conducting studies alongside me in biochem, and was using a UV transillumnator to lightup DNA fragments (tagged with EtBr) anyways the full face mask which we normally use for this (looks like a riot face shield 'cept it blocks UV radiation) was missing (lousy undergrads) so she decided to use UV glasses. Unfortunatly she was a bit hardheaded and when the glasses fogged up she got all pissed and took them off for a "few seconds" so that she could see fragments. In any event the next day (thanks to our crazy-powerful transilluminator) her eyes were very red (no doubt an inflammation response to cellular damage.. horray for pyrimidine dimers) and had to conastantly wipe tears away as she worked. I also rememeber when i was still a scrub in graduate school, how i came home with a nice 1/2 arm "tan" thanks to the transillumnator, not to mention the time i almost accidently killed myself with sodium azide. Good times good times
<3 grad school
<3 grad school
I know it wasn't related to my weldin stuff, i just had to brag about how good it is. My dad is nearsight, my mum far sighted. But I am the worst of anyone in my family vision wise. Can't see/read anything more than 4" away.
If you really were myopic (nearsighted, not shortsighted
), then your prescription would be negative. This is because your eyes are too optically powerful such that the optical power needs to be decreased for the formation of a sharp image on the retina. My prescription is -4.25 diopters - that's pretty bad. If your prescription really is -0.125 diopters, then your contacts are the slightest adjustment to your vision. In fact, I've never seen contacts offered in such small increments.TRENDING THREADS
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