Multiple eye problems.. please help

My husband is facing strange eye problems since last two weeks, though his eye doctor did a complete check up couple of days ago, and said everything looks fine. We have to see a Retina Specialist tomorrow.. will post the update from him tomoroow here. But the main symptoms that he is facing are:

1. Intense burning in eyes, especially after working on computer
2. Eyes feel heavy, and he wants to keep them close all the time
3. Eyes feel tired and sore
4. Vision feels dim... though nothing came up in the checkup.. he feels the room darker
5. Difficulty in accomadation, when he goes out sometimes(i.e. takes time to focus on things)
6. Increase in dark floaters
7. Images persist when he closes his eyes
8. Nausea when he stands for a longer times
9. Sensitivity to light
10. Pressure in eye balls

Have been taking Belladonna 200X once a day for 3 days. On 30th June, since there was no improvement with that, I started taking Ruta 30C twice daily, and then took Ruta 200 for 4 days. Yesterday, ie 10th July, my doctor gave me Gelsemium 10M.

Can anyone tell me what could be causing these problems? And any medications for the same?

Thanks,
Shweta