Question

How do you draw optical isomers?

Answer 1

By using models.

Explanation:

You have to represent a three dimensional geometry on two dimensional paper. There is no substitute for the use of models; and every organic chemist uses them.

I can offer one tip. Suppose you have made a model or CORRECTLY represented your stereoisomer on paper. The interchange of any two substituents around the chiral centre results in the enantiomer. Interchange again (it doesn't matter which pair of substituents!) you get back the original stereoisomer. You should have a play with some models to persuade yourself that this is in fact the case.

Good luck,