your redness is most likely due to your naphazoline use, especially if you have used it for an extended period (2 drops/day for more than say 6 weeks). i call that "naphazoline addiction".
those naph tears are ONLY intended for OCCASIONAL use. like you have redness and you need to look normal for your WEDDING or something. they actually CAUSE redness when used on a chronic basis. you have to quit the naph tears cold turkey. did the doc who told you to use dexamethazone also tell you to stop the naph tears?
pterygium removal is not a particularly invasive surgical procedure, but a lot of the time the pterygium returns. the "latest" surgical removal procedures use a newer technique and medications to prevent regrowth...
naphazoline addiction is not a nice thing. if you quit the naph tears, you will actually look MORE RED for a few days. then after a few weeks you'll start looking pretty normal again. during those weeks the ideal thing would be to used CHILLED (in the fridge) over-the-counter artificial tears (aka lubricant eye drops)...say one drop in each eye every hour would be ideal.
99% of sunglasses are 99% uv protectant. even the cheap ones. no, you do not need expensive sunglasses. if you are in the U.S, you'll actually have a very hard time finding sunglasses that are NOT uv protectant.
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