Hello Akshita,
The best career choice is wholly depends on your interests.
Both the Pharmacy and Optometry are the courses of Health and Medical field.
Here are some points about both the Courses which may help you to choose the best course for you :
Pharmacy contains detailed knowledge of drugs,their interactions, side-effects and their compounding and dispensing .
You will learn Pharmaceutics, Pharmacology, Pharmacognosy,Industrial pharmacy subjects in the Pharmacy.
After completion of your course you have bunch of  opportunities for further studies like M.Pharmacy or you can get a job in pharmaceutical companies or you can start your own medical store.
Optometry is developing and rapidly growing field.
In optometry you get to learn specifically about eye.
After completion of the course you have direct interaction with patients whereas in Pharmacy there is no direct interaction with patients.
Optometry also provide you an opportunity of further studies or job in association with health specialist working in the vision care of patients.
Both are the best career choices, you can choose wisely depending on your interests.

Hope it helps :)