You need to visit physically to their office on Green Belt between F-8 and F-9. Bring original CNIC and expired license. There will be long queue and you need to get token alongwith prescribed fees. You will also require to verify you CNIC from one of the counter on payment of Rs 25. At your turn you will be checked by Doctor (Eye site only), bring glasses if you using them and data entry and then final date.
No test for renewal - I recently renewed my license ..