There are a few things that i need to know before giving a more precise response
1. what viral infection are you talking about. as u r saying that there is residual irritation, i will assume that its viral conjunctivits. If that is so, then i would strongly advise you to stop dexoren-s. this is a steroid
and must be used with extreme caution in case of viral infections.
2. this drug does not have any role to play in retinal pathology. only if u r aphakic (i.e. have been operated for cataract
and no IOL has been put in the eye), does the drug reach the retina. so no point in using the same for retinal spots.
kindly do consult your doctor again and get back with the full reports.
hope this helps