Binocular Loupes: How to Choose Magnification, Working Distance and Illumination

Most people shop for binocular loupes by starting with magnification, because magnification is the number printed on the box. It...

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Best Binocular Indirect Ophthalmoscopes (BIO) in 2026: How to Choose an Indirect Ophthalmoscope

A binocular indirect ophthalmoscope (BIO) is the head-worn indirect ophthalmoscope that, paired with a hand-held condensing lens, gives a wide,...

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