Indian Optometry schools don't offer an OD degree. Optometry students go abroad to pursue their OD. USA has many Universities that offer this degree. The USA, Australia, Philippines, some parts of UK offer OD. After the completion of your BS degree, you need to clear the Optometry Admission Test(OAT), GRE and TOEFL to be eligible to apply for an OD in the USA.

Check the guidelines mention in the Association of Schools and Colleges of Optometry (ASCO)website. You could also google individual colleges to understand the eligibility criteria.