5 Aperture: Ophthalmoscope diagnostic with 5 aperture options of small, large, semicircle, fixed, and no red filter, which bring you much convenient. Item Type: Ophthalmoscope. 1 x Ophthalmoscope. 19 Diopters: Eye diagnostic tool with 19 lenses of different diopters, from ‑20 to +20 diopters, which is perfect for better resolution and eye examination.
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