Wearing spectacles won't make you ineligible for most of the Government jobs. Some of the jobs such as Army, Airforce etc needs physical standards to be accurate in relevance to there work type. For that case, there are conditions regarding eye sight which can make one ineligible if he/she exceeds the limit. But apart from this, you are eligible for most of the Government jobs.

Some of the top Government Job examinations are:

• UPSC CSE
• STATE CIVIL SERVICE
• SSC CGL
• SSC CHSL
• RRB NTPC
• SBI PO
• SBI CLERK
• STATE POLICE SERVICE
• STATE PUBLIC SERVICE COMMISSION

For Government jobs after 12th you can consider visiting the link provided below:

https://www.careers360.com/articles/govt-jobs-after-12th-counar

I hope this helps. Wish you a great day!