| 摘要 |
An opthalmoscope comprising an attachment portion, capable of being clipped onto a commonly available light source, such as a penlight; a light deflector, such as a mirror or prism, for deflecting light from the light source into a subject eye; a housing, for holding the deflector in fixed relation to the attachment portion; and a stenopeic aperture, in the housing, between the light source and the deflector, for limiting the light incident on the deflector to a specified meridian.
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