The most used presbyopic lens for a head mirror is attached by a cumbersome spring arrangement. I had a lens made up which is cemented on to the back of the head mirror. This lens is just slightly larger than the opening of the mirror and is beveled so that it projects very little.
It can be made up by any optician and has been found very convenient and useful. The lens in the illustration was made up by the House of Vision.
1020 First National Building.
MANNING EL. SIMPLE PRESBYOPIC LENS FOR HEAD MIRROR. AMA Arch Otolaryngol. 1956;63(3):294. doi:10.1001/archotol.1956.03830090066015
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