I bought two pair of Ray-Ban sunglasses recently (shown above), one a Wayfarer and the other, an Aviator. Together, they cost me about almost SGD 800 and I purchased them from the reputable Paris Miki.
I was initially hesitant wearing them because it made me look too pretentious. But after a few times wearing them during lunch, I found them useful in protecting me from the glare of the sun. I think the next step for me would be to source for corrective eye surgery (otherwise known as LASIK) for just my right eye, which has slight astigmatism.