Yes an Optometrist  can use   after OD programme.

No, an optometrist cannot use the prefix dr because he has completed education from paramedical institute. Only those educated from medical University in MBBS, BHMS, BAMS,B.U.M.S, BDS and master degree in medical field or doctor of philosophy (PHD) can use the prefix "Dr."

Optometrist is person who provide primary health care for eye. They are known to treat eye disease write prescription for lenses and finding eye abnormalities.

However they are not doctors. In case there is need of surgery, an optometrist needs to send the patient to surgeon. So as an optometrist you can't use Dr. as prefix.

For Dr. prefix you need to go for mbbs or any other medical degree and not just bsc.

Hi
For being a doctor you have to complete a MBBS degree or you have to complete a doctor degree in any subject. An optometrist is not a medical doctor. An optometrist receives a doctor of optometry (OD) degree after completing four years of optometry school, preceded by three years or more years of college. You will require a bachelor's degree to apply for optometry programs. Optometry programs typically take an additional four years to complete.
Master Degree Courses:
Master of Optometry (M. Opto)
Master of Science (M.Sc)
M.A/ M.Sc. (5-year Integrated) Courses.
To become an ophthalmologist, you must first complete an MBBS (Bachelor of Medicine and Bachelor of Surgery) program and then pursue a postgraduate degree in ophthalmology, such as an MS (Master of Surgery) or an MD (Doctor of Medicine).  She/he has to work through various vision therapies to treat abnormalities, and can prescribe drugs for the eyes. If surgery is required, the patient is sent to an ophthalmologist (M.D). But you can't write Dr front of your name. Because only getting BSC degree no one can be a doctor. Hope this helps.