Depends upon the hospital settings & operating surgeon.

Cataract surgery is a daycare procedure Blood investigation-1.Complete hemogram, 2. If he/she/others is diabetic get FBS, PPBS 3. Serology- HIV, HBSAG, VDRL The above are the basic investigations. Other investigations depends on the hospital or institutions A-scan for intra ocular lens implantation (IOL). If it is dense cataract B-Scan .

Bp,sugar,ecg,Hbsag,Hiv,are done commonly.fitness for cataract surgery  certificate to be given by physician. Pl consult ophthalmologist for further evaluation and treatment

It would be ideal for you to get an online consultation to address all your concerns.

Depends on the hospital and patient. Bp, Rbs, cbc, hiv, HbsAg are generally advised.

Hi CBC, rbs, hiv, hbsag these are basic test required remaining few test depends on patient to patient