One of the following preparations used as optic drops for dewaxing:
- a- 5% glycerin bicarbonate.***
- b- 5% alcoholic bicarbonate.
- c- Glycerin magnesia.
- d- Glycerin phenol.
The correct answer is a- 5% glycerin bicarbonate.
Glycerin bicarbonate, also known as sodium bicarbonate glyceride, is a common ophthalmic preparation used for dewaxing. It is a mixture of glycerin and sodium bicarbonate, which helps to soften and remove wax deposits from the eyelashes and eyelid margins.
The other answer choices are not as effective for dewaxing:
b- 5% alcoholic bicarbonate:
Alcoholic bicarbonate can be irritating to the eyes and is not as effective as glycerin bicarbonate for dewaxing.
c- Glycerin magnesia:
Glycerin magnesia is a mixture of glycerin and magnesium oxide, which is not as effective for dewaxing as glycerin bicarbonate.
d- Glycerin phenol:
Glycerin phenol is a mixture of glycerin and phenol, which is an antiseptic and can be irritating to the eyes.
Therefore, glycerin bicarbonate is the most effective and safest option for dewaxing.