Compared to other prism specs, do these sacrifice field of view to achieve the lighter weight?

The glasses use lighter frame materials and simpler appearance design, so they are much lighter than the previous prism glasses.

Does it weigh without packaging?

The weight of these glasses is about 0.09 pounds, which is much lighter and more comfortable than the old model.

What is the inside width of these glasses? I want to make sure they fit my head.

The widest part is about 6 inches, which is suitable for most people. The glasses frame has certain expansibility. The gray part of the glasses frame is made of soft material to enhance the wearing comfort.

can I wear these in an MRI tube?

Check with the technician. I can't imagine why would would need them as you need to stay perfectly still and you cant be bringing anything in the tube.

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📖 Read in Style, Relax in Comfort!

UNIVERSAL FIT - Designed for both men and women, ensuring comfort for all.
EFFORTLESS COMFORT - Experience reading and viewing without neck strain.
PERFECT GIFT CHOICE - An ideal present for avid readers and screen enthusiasts.
FASHION MEETS FUNCTION - Stylish design that complements your modern lifestyle.
HIGH DEFINITION CLARITY - Enjoy crystal-clear visuals with premium optical materials.

The CHANGARPrism Glasses are lightweight, 90° vision spectacles designed for comfortable reading and viewing while lying down. Made with high-quality TR90 frames and optical prism materials, these glasses prevent neck pain and eyestrain, making them perfect for bedridden individuals or anyone who enjoys leisure time in bed.