The currently popular eyeglass mart polycarbonate lenses, also known as PC lenses. It is a durable and inexpensive plastic. It not only has a high refractive index but also a high resistance to ultraviolet light. In addition, it is also very durable, has better impact resistance than ordinary plastics, has scratch resistance, and is also very affordable.

Based on determining the material of the lenses, we will also choose the color-changing cheapest eyeglasses lenses. Color-changing lenses will react to ultraviolet rays, remain transparent indoors, and darken under sunlight. For some older people, it is a wise choice.

But there is a small detail, color-changing lenses will not work inside the car because the windshield filters out ultraviolet rays. Therefore, wearing color-changing lenses when sitting in the car for a long time is not a good choice. In addition, the darkness and reaction time of different quality color-changing changing discountglasses lenses vary, so we need to spend time comparing them.

In addition, there are progressive lenses that have a dual focus, providing us with visibility at all distances. When we move our eyes up and down, the visual distance changes with the focus. For people with both myopia and farsightedness, this is a good choice.

However, progressive lenses have obvious drawbacks, as they may cause us to lose our sense of distance, such as difficulty adapting to stairs with our eyes. Therefore, middle-aged and elderly people should use these lenses with caution.

We can also access high-definition lenses. This type of lens can provide us with clearer and clearer visual effects than PC lenses. But at the same time, the price is usually expensive. Generally speaking, it is suitable for people who are particularly picky about visual effects.