Final answer:
The question pertains to the difference in effectiveness at reducing glare between ophthalmic and sunglass frames from different brands. It underscores the use of polarized lenses in sunglasses to block horizontally polarized light, which is reflected off surfaces, versus the lighter specifications in regular ophthalmic frames.
Step-by-step explanation:
The question is asking about the properties of ophthalmic frames and sunglasses from various brands, which relates to the light polarizing features of the lenses used. Sunglasses are often equipped with lenses that block polarized light. With unpolarized light being light that has no preferential direction of vibration, it can be distracting and sometimes harmful to the eyes when reflected off surfaces.
Sunglasses with vertical axes are designed to block more reflected light than unpolarized light from other sources. This is because reflected light, such as from water or roads, tends to be horizontally polarized. The vertical alignment of the polarizing filter in the lenses of sunglasses acts like an arrow bouncing on its side, which makes it more likely to block this reflected light. Therefore, the Rx parameters, which likely refer to the prescription strength or lens specifications, being lower in ophthalmic frames means they are not as optimized to reduce glare from reflected light as sunglass frames.