reciprocal value of the focal length of a lens measured in metres: a power of +5 dpt therefore has a reciprocal length of 1/5 metres or 20 centimetres. What is long-sightedness? In the case of long-sightedness [...] read we require a functioning retinal surface of around 2.5 degrees to the left and right of the fixation point, i.e. a visual angle of around 5 degrees in total. A reading angle is necessary as our eyes [...] There is no standard answer to this question, as it differs for each vision task: a visual acuity of 0.1 is sufficient for a person to be able to orientate themselves outdoors. However, a visual acuity of
sUSB port, Type C port for transmitting images onto a computer (PC and Mac)Operating time: 3.5 hWeight: 460 gIncluded in delivery: HDMI cable, USB Type C cable, 4 GB SD card, universal charging device [...] white/red red/white violet/black black/violet blue/black black/grey Dimensions Dimensions13.8 x 20.1 x 2.9 cmWeight460 g Extended features Reading guidelinereading line & reading lineDLS - Dynamic Line [...] run time3.6 hCharging time3 hPower supply charging deviceIn: 100-240VAC 50/60Hz 0.6A max, Out: 9VDC 2.5AOperating temperature10 – 40 °CCharging portRund-HohlsteckerPort for data transmission to PCUSB-CVideo
sUSB port, Type C port for transmitting images onto a computer (PC and Mac)Operating time: 3.5 hWeight: 460 gIncluded in delivery: HDMI cable, USB Type C cable, 4 GB SD card, universal charging device [...] white/red red/white violet/black black/violet blue/black black/grey Dimensions Dimensions13.8 x 20.1 x 2.9 cmWeight460 g Extended features Reading guidelinereading line & reading lineDLS - Dynamic Line [...] run time3.6 hCharging time3 hPower supply charging deviceIn: 100-240VAC 50/60Hz 0.6A max, Out: 9VDC 2.5AOperating temperature10 – 40 °CCharging portRund-HohlsteckerPort for data transmission to PCUSB-CVideo
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