I assume your short-sightedness (myopia) is mild, and in that case you must NOT wear glasses when reading books or doing near work in general. Glasses are meant for distance and optically speaking "distance" means 20 feet (6 meters) or more. When you use your glasses to look at something closer, your eyes make an effort to compensate the glasses which in that specific circumstance are too strong. That effort is called over-accommodation and it's the main cause of myopia (short-sightedness). The shorter the distance, the greater the strain on your eyes. Using glasses to watch tv might still be acceptable because distance isn't very short, but wearing glasses to read a book is the worst thing you can do to your eyesight.
A young person who has perfect eyesight can easily become myopic if he/she spends most of the time looking at things that are too close. Constant over-accommodation leads to myopia. When one becomes myopic, the use of wrong glasses (i.e.. too strong for a specific task) leads to over-accommodation and to more myopia. For instance many boys/girls keep books too close when they read/study. It's not necessary, it's just a bad habit that may ruin their eyesight over the years
A considerate eye doctor/optometrist/optician should always tell their young patients that glasses are not to be used unless they are necessary. When a myope can see fairly well without them, they must not use them. For example many young myopes do not need glasses for reading and writing, because for such a small distance their natural eyesight is more than enough. You can read books and write without glasses/contacts, so don't use them. When distance is greater you may use glasses but only if you feel you need them. Always remember to remove them when you don't really need them.
If I were you I'd try to get rid of myopia in a natural way. Since you have interests in the bio-medical field you could find this book very interesting: https://www.amazon.com/Secret-Perfect-Vision-Prevent-Nearsightedness/dp/1556436777/ref=sr_1_1?ie=UTF8&s=books&qid=1254924159&tag=ahai-20
Despite its horrible title it deals with myopia and its causes in a very scientific way, and it also includes a visual training method which has allowed me to reduce my myopia from -3.75 to -1.00 (so far).
There's also a forum: