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Joseph Chamberlain wearing a monocle
Joseph Chamberlain wearing a monocle
A 20th-century gold plated monocle with gallery
A 20th-century gold plated monocle with gallery
19th-century gold-filled quizzing glass
19th-century gold-filled quizzing glass
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A pair of contact lenses, positioned with the concave side facing upward
A pair of contact lenses, positioned with the concave side facing upward
Typical pair of single vision glasses
Typical pair of single vision glasses
These bifocals are upside down as they rest on the surface. The add segment of the lens for near vision is the D-shaped area.
These bifocals are upside down as they rest on the surface. The add segment of the lens for near vision is the D-shaped area.
Prismatic color distortion shown with a camera set for nearsighted focus, and using -9.5 diopter eyeglasses to correct the camera's myopia.
Prismatic color distortion shown with a camera set for nearsighted focus, and using -9.5 diopter eyeglasses to correct the camera's myopia.