Spectacles wont make huge differences in identifying a Candidate. So you do not have to worry even if you wear glasses. You filled in the application form in January and the exam is being conducted in September and changes are bound to happen. So you are allowed with spectacles. But take 2 passport size photos which are the same like the one you uploaded on the application form. You will need one for self declaration form also. Along with you take the admit card, 3 passport size photos valid id card like Aadhar card, Voter Id, Driving license, Passport or Ration card. Do not forget your mask and gloves, sanitiser 50ml, a transparent water bottle. If you are worried if they will allow you or not, you can carry a xerox copy of your power. Once they see it, you can dispose it because you will not be allowed to take it inside.