Paramedical

Yes, certain universities provide grants for students pursuing a Master's degree in Operation Theatre Technology and Anesthesia (OTAT):
Gurukashi University: Offers a range of scholarships for students, including an Early Bird Scholarship, a Special Meritorious Scholarship, and scholarships for single girls, orphans, and seniors. 
Other colleges offering Operation Theatre Technology courses include Jawaharlal Institute of Postgraduate Medical Education and Research in Puducherry, SRM Institute of Science and Technology in Chennai, Adesh University in Bathinda, Sumandeep Vidyapeeth in Waghodia, Indian Institute of Health Education and Research in Patna, AIIMS in Delhi, and CMC.
Jamia Hamard
Sanjay Gandhi Postgraduate Institute of Medical Sciences.

There's several good colleges in India that do offer cardiovascular technology courses, one among which is Manipal Academy of Higher Education, MAHE, which has an annual fee average of about INR 2.3 Lacs for a degree program.

 Kasturba Medical College at Mangalore is another great option under the established names in this area of education. If you are looking for much cheaper alternatives, you can also try Government Medical College at Kozhikode and Sri Venkateswara Institute of Medical Sciences at Tirupati; both offer excellent programs but at very low fees. The choice of institution will thus depend on the financial budget, proximity from home, infrastructure, etc.

Most of the institutes admit students based on entrance exams like NEET UG or university-specific tests.

The latest cutoff for B.Sc. in Physician Assistant at Karpagam Academy of Higher Education (KAHE), Coimbatore is not mentioned anywhere in these current web results.

Though KAHE provides many B.Sc. courses, there are no details regarding the cutoff for the particular course of Physician Assistant. For the latest and most authentic cutoff, it usually is best for the prospective student to directly contact KAHE or alternatively visit the website of KAHE concerned over this particular course regarding the most recent admission criteria and cutoff scores. Remember that cutoffs can change from year to year according to the number of applicants and their performance.

Since, Optometry is not mentioned in the list of subjects for the UGC NET examination, the following points maybe of help to you. One can give the UGC NET examination in a related subject such as Life sciences (code 45) or Physical sciences (code 35). Still, you are going to have to study more and make sure your post-graduation degree will be in the field of the chosen subject. There are other competitive exams by National Testing Agency such as CSIR NET exam in which there is one subject that can be related to Optometry called Life Sciences. Approximately 16,000 students sit for CSIR NET each year, while just 2,500 – 3,000 students pass.