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1348-5346 - Using refractive telescope to select optical correction in spectacle lenses. Masked patient and doctor - Covid 19.
1348-5590 - The boy is the patient on reception at doctor ophthalmologist. Diagnostic ophthalmologic equipment. Medicine concept.
1348-5347 - Using refractive telescope to select optical correction in spectacle lenses. Masked patient and doctor - Covid 19.
1348-5592 - The boy is the patient on reception at doctor ophthalmologist. Diagnostic ophthalmologic equipment. Medicine concept.
1348-5344 - Using refractive telescope to select optical correction in spectacle lenses. Masked patient and doctor - Covid 19.
1348-5593 - The boy is the patient on reception at doctor ophthalmologist. Diagnostic ophthalmologic equipment. Medicine concept.
1348-5345 - Using refractive telescope to select optical correction in spectacle lenses. Masked patient and doctor - Covid 19.
1349-755 - River Nile Delta and Suez Canal, Egypt, satellite image
1350-531 - Addis Ababa, Ethiopia - Arabica coffee beans being graded by an optical coffee sorter at Oromia Coffee Farmers Cooperative.
1179-4189 - Aerial view of Le Morne Brabant and the Underwater Waterfall optical illusion and natural phenomena, Mauritius, Indian Ocean, Africa
832-383813 - Optical illusion, man holds off-roader on hand, Salar de Uyuni, Uyuni, Potosi, Bolivia, South America
869-5410 - astronomical observatory on mountain Roque de los Muchachos optical mirror in foreground outdoors National Park Caldera Isla La Palma Santa Cruz Province Canary Islands Spain Europe
832-321900 - Modern coin telescope, observation terrace, airport Duesseldorf, NRW, Germany
832-311237 - Illuminated advertising of Leica company office in Wetzlar, Hesse, Germany
832-358538 - Sundog appearing in ice fog, rainbow colours, ice crystals, Yukon Territory, Canada
832-269880 - Plune Castle, owned by the Fielmann AG optical company, Ploen district, Holsteinische Schweiz Nature Reserve, Schleswig-Holstein, Germany, Europe
832-269879 - Plune Castle, owned by the Fielmann AG optical company, Ploen district, Holsteinische Schweiz Nature Reserve, Schleswig-Holstein, Germany, Europe
832-269881 - Plune Castle, owned by the Fielmann AG optical company, Ploen district, Holsteinische Schweiz Nature Reserve, Schleswig-Holstein, Germany, Europe
832-234383 - Optical illusion, floor, mosaic, Lateran Basilica, Basilica di San Giovanni in Laterano, historic city centre, Rome, Italy, Europe
832-151551 - Center for Photonics and Optical Technologies, Photonics Center, Humboldt-Universitaet university, Wissenschaftsstadt Adlershof Science City, Berlin, Germany, Europe
832-151549 - Center for Photonics and Optical Technologies, Photonics Center, Humboldt-Universitaet university, Wissenschaftsstadt Adlershof Science City, Berlin, Germany, Europe
832-151558 - Center for Photonics and Optical Technologies, Photonics Center, Humboldt-Universitaet university, Wissenschaftsstadt Adlershof Science City, Berlin, Germany, Europe
832-151554 - Center for Photonics and Optical Technologies, Photonics Center, Humboldt-Universitaet university, Wissenschaftsstadt Adlershof Science City, Berlin, Germany, Europe
832-76009 - View over the cloud cover with Nordic Optical Telescope observatory, astronomical telescope, Roque de los Muchachos Observatory or Observatorio del Roque de los Muchachos or ORM, Mt. Roque de los Muchachos, volcanic island of La Palma, La Isla Verde, La I
832-76007 - View over the cloud cover with Nordic Optical Telescope observatory, astronomical telescope, Roque de los Muchachos Observatory or Observatorio del Roque de los Muchachos or ORM, Mt. Roque de los Muchachos, volcanic island of La Palma, La Isla Verde, La I
832-76008 - View over the cloud cover with Nordic Optical Telescope observatory, astronomical telescope, Roque de los Muchachos Observatory or Observatorio del Roque de los Muchachos or ORM, Mt. Roque de los Muchachos, volcanic island of La Palma, La Isla Verde, La I
832-44857 - Arched ceiling, ceiling painting, 1703, by Andrea Pozzo, creating a perspective optical illusion, Jesuitenkirche church, Doktor-Ignaz-Seipel-Platz square 1, Vienna, Austria, Europe
1113-30604 - camping under the starry sky in the libyan desert, Moon Halo, Libya, Sahara, Africa
832-20969 - European green toad (Bufo viridis) in front of a camara
987-470 - Winding mountain road, Glen Etive, Argyll, Scotland
832-6848 - Sun ring - Halo - nature phenomenon, Zudar, Ruegen, Mecklenburg-Vorpommern, Germany
586-352 - Magnifying glass above an Ordnance Survey map, Scotland, United Kingdom, Europe
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