MODEL RELEASED. Eye examination. Optician using a phoropter to examine a ten year old girl's eyes. This device is used to measure the refractive error in the eyes and to determine an individual's lens prescription. A refractive error is an error in the focusing of light by the eye,which is one of the causes of visual sharpness | |
Lizenzart: | Lizenzfrei |
Credit: | Science Photo Library / Hooton, Ian |
Modell-Rechte: | vorhanden |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |