Eyeglasses can be costly due to many reasons, it's likely that improved architecture, structure, products, producer experience, and the “fashion element” aren't the whole story. The whole situation is more complicated. One of the lesser-known aspects of the eyeglass industry is that it is not as much of an “open market” as other people believe.
Although you may not be familiar with EssilorLuxottica, you would undoubtedly know at least a couple of the frames and prescription brand names for which this firm has licensing or trademark rights: such as Ray-ban, Oakley, Tom Ford, etc.
Both of these brands, as well as a slew of others, have frames and lenses manufactured by EssilorLuxottica. So, if you're shopping for a new pair of spectacles in Bangladesh and notice the price range from budget to luxury, odds are you'll end up with an EssilorLuxottica frame and lenses.
In addition to making frames and lenses for sunglasses in Bangladesh for a wide variety of brands, EssilorLuxottica also operates a host of well-known optical shops, including LensCrafters, Pearle Vision, Aim Optical, and Sunglass Hut, to name a few. Different firms and their brands fight for the company in a free economy, but in the eyewear market, the perceived brand rivalry is often a ruse. Of necessity, the manufacturer is in a fantastic financial position. But not so much for the user. EssilorLuxottica will effectively set the price without the true forces of free-market competition to balance the scales, which is one of the major reasons that eyeglasses are so expensive.
A decent pair of sunglasses is really cool, and most eye doctors would advise you that when you're outside, you can wear UV protection. However, most people will admit that not having to wear prescription eyeglasses and shades any waking minute is a great relief.