DMV.com covers senior drivers in Indiana by stating that drivers up to age 75 are required to renew their license every 4 years. Drivers ages 75 to 85 can renew their license for a period of 3 years.
Indiana: Older Driver Information — Indiana (03/06/2019)Source: Association
Kentucky: Driver License Information for Seniors — KentuckySource: Association
Caregiverlist.com states that there is no renewal test for seniors in the state of Kentucky. The renewal cycle is every four years and must be done in-person.