RogerBW's Blog

Prism Glasses 16 April 2016

As another post-eye-surgery present to myself, I bought the lazy man's ultimate accessory: spectacles that turn one's field of view through right angles.

The housing holds a pair of double-reflecting prisms, so that the view through the glasses as one lies on one's back looking staight up is towards one's feet.

This is helpful if one's spending time in bed while awake; when I had brucellosis some years ago they'd have been tremendously useful. They're rather less so now, but they do provide a different posture for reading in bed.

The only thing really wrong with them is that the glass isn't the best, and they absorb and distort enough of the light that they're not well suited for reading in the dimmish light I usually prefer – though under a bright light there's no problem. The field of vision is also quite narrow. They do however work very well with a laptop resting on one's torso.

[Buy this at Amazon] and help support the blog.

Tags: toys

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