I have often heard that glass is of a higher optical quality then plastics. Most of the people that I sell to prefer glass as it is of higher scratch resitance. My question, is the optical clarity of glass perceptable on a perceivable level or is it only a technical difference. Also, I know that glass is more scratch resistant then plastic but is that only a scientific norm as opposed to good treatment with the proper lens cleaning tools? Glass or plastic in the hands of an idiot is just as likely to scratch I'm sure. What would you consider to be a good life for a frame. I have some customers with 20 year old frames and some with 2 week old frames that decide they have to change.
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