You may have to change out that bulb. I have never had problems with MVBs, but I have heard that they have lots of variation from bulb to bulb. I recommend a flourescent UV light and a 100 or so Watt basking lamp.
Second, he needs a new soil. I would say you could use cypress mulch from a pet store and make sure it is wet, but not soaking. Dry dust could be getting in his eyes.
OMG that looks bad. Make an appointment at the exotic vet ASAP. Buy carrot baby food and put that and warm water for soak.
You also need to find a way to give your tortoise a larger enclosure. I understand limitations on space but our care sheets for these guys call for a minimum of 4ft x 8ft. 4 yrs old isnt full grown but even a juvenile russian needs way more space than your tank provides. Being able to roam around there enclosure is an important part of their metabolic process.
I have linked the caresheet for Russians, pls have a good read, if you have questions please ask, and dont disregard things because it is inconvenient, we are literally talking about the animals wellbeing.
The Best Way To Raise Any Temperate Species Of Tortoise | Tortoise Forum