|
|
Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
![Coronary stent. Illustration of an angiogram revealing a coronary stent, which helps prevent closure](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_15_45_100291618.jpeg)
![To reduce stress on your client’s neck when the head is turned, put a towel under the shoulder and ...](https://biology-forums.com/gallery/27/medium_679044_04_04_17_12_51_14.jpeg)