why should you not touch microscope lenses with your fingers or wipe them with lens paper?
465418
the lens of the microscope are very sensitive and the oil and dirt from your fingers can easily scratch them. you can use lens paper to clean them but before wiping, blow off any dirt by using a can of compressed air found in camera stores.
1073832
Wash your hands before and after touching your eyes and face and before and after using medication in your eyes, don't share eye makeup and don't use eye makeup until the infection is fully cured, don't share contact lens equipment, don't wear contacts until the infection is cured, don't share eye medication, don't share towels, linens, pillows, handkerchiefs.
1034801
give it a good clean, use a lens cleaner..
755709
I also wear contacts, soft lense or hard lense can make a difference.  Your eye hurt cause while you sleep your eye are constantly moving.  But your eye stay close so your contacts dont get any oxygen to breath.  So when you went to take the contact out it was probally really dry and sore.  You should make sure that you rinse out your contact really good.  The slimy stuff is just stuff that blinds up from your contact being in there and fighting against germs. Use your drops at night.  And try to give your contacts a break tonight or today.  It will be feeling better in about a day.
782361
do what the doctor told you to do...you may be making your eyes worse by not wearing them...if you really dont like then, then why dont you get contacts?
546123
The lens elements are made of transparent materials. Glass is the most widely used material due to its good optical properties and resistance to scratching. Various plastics, such as acrylic (or PMMA), the material of Plexiglas, can also be used. Plastics allow the manufacture of strongly aspherical lens elements which are difficult or impossible to manufacture in glass, and which simplify or improve lens manufacture and performance. Plastics are not used for the outermost elements of all but the cheapest lenses as they scratch easily. Moulded plastic lenses have been used for the cheapest disposable cameras for many years, and have acquired a bad reputation: manufacturers of quality optics tend to use euphemisms such as "optical resin".
226544
the moderns cameras have so many lens elements that it's easy to get reflection artifacts--even ones which don't "look like" reflection artifacts (which is to say you just don't really know what to look for).\n\nNot much you can do about them, except use a lens hood and hope for the best.
1170392
Be able to spot it when you see it to avoid it first of all and second, never use a dirty towel. We often tend to use our towels longer than usual. I normally use my towel twice and then throw it in the washing machine.\nHave your own wash cloth.\nWash your hands daily briskly with soapy water and create a lather bewteen the fingers and between the nails to insure your hands are clean. Avoid rubbing your eyes with dirty hands.
588995
The real concern with rubbing your eyes is getting germs in them.  You can get sick or eye infections that way.  If you need to rub them, use a clean tissue.
683826
If you are getting daily disposables, no problem. Just throw them out each night.\nIf you get the ones designed for longer wear, follow your optometrist's instructions carefully.  Disinfect your contacts everyday, using fresh solution each time.  Replace the storage case every month.  Never share your contacts with your friends (this actually does happen).
1062060
Actually it's not good for you as excessive rubbing with too much pressure can cause your eyeball to change it's shape resulting in vision problems (even just a slight change in the shape can cause this).  Why do some people's brains make drugs, alcohol, or cigarettes feel good?  Not real sure there is an answer for that.  My guess, because we as human beings naturally tend to like things that aren't all that good for us.  Especially when we know it isn't good for us.  LOL.  Or it could be that rubbing them causes your eyes to produce more tears thus clearing debris (bacteria, dirt, etc) that is irritating the eye out of the eye.  Just a guess.\nOh and your eyes have a natural defense against most bacteria/fungi that would get into your eyes (tears, which are used to flush these things as well as others from your eyes.  If I"m not mistaken your tears are slightly acidic which kills a lot of organisms that would get into your eyes.  I might be wrong on that though, they might be slightly basic.  Whatever, the pH level of your tears has something to do with it)  That said, it is a good idea to wash your hands before touching your eyes or any other part of your face.
931607
Try cleaning the lens with a soft cloth then adjust the focus to your liking.
370114
they are cheap compare to electron microscope.\nbut there is limitation of zooming large.
183660
It's perfectly fine to do that (as long as the contacts don't have any power and your glasses are up-to-date).  Just be sure that you're taking proper care of the contacts (cleaning them correctly, not overwearing them, etc).
572190
You need to clean the lens with a CD lens cleaner. Its either your car CD player or the CD's need cleaning. You should know how to clean a CD.
173856
Contact lenses aren't harmful to wear as long as you follow your eye doctor's instructions very carefully. There are certain types that you can wear for long periods of time no matter what you are doing. Your eye doctor should be able to answer all of your questions about this issue.
65373
Optics - microscopes and telescopes all invert the image because if they didnt, it would mean that another lens had to be added, increasing money cost. A lens is convex on both sides. That means the middle is thicker than the edges. A microscope or telescope has two lenses (basically).\nThe objective lens (usually larger and closer to the specimen or object) which allows the image of the object to be reduced to a smaller workable image inside the scope. This image is inverted inside the scope. It is also too small to see with the eye, so you need another lens, the eyepiece.  The eyepiece focus's your eye on the image and magifies it so you can see it. Every lens has a focal length, the point at which the image is formed away from the surface of the lens.