Two large studies came to different conclusions. Intravenous ganciclovir appears to be the most effective overall CMV treatment. Implants are very effective at stopping retinitis, but only in the eye with the implant. Pills are the easiest to manage. While ganciclovir meant up to 12 pills a day, valganciclovir can be as few as 2 a day.
Ocular injections mean inserting a needle directly into the eye.
Implants, which last six to eight months, take about an hour to insert in an office procedure. CMV retinitis can progress rapidly and lead to blindness. For this reason, it is treated aggressively when it first shows up. The newer injections or implants put medication directly into the eye and have the greatest impact on retinitis. CMV can also show up in other places in the body.