JH-35 3M LED EFP visual chart light box, 2.5CM thickness
$
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Specifications: | |||||||
* Normal multi-functional vision chart light boxes | |||||||
* Decimal record: 0.1~2.0 | |||||||
* 5 point record: 4.0~5.3 | |||||||
* Product size: 92 * 45 * 10cm | |||||||
* Red-green chart, worth 4 dots, ray astigmatism chart, round dot astigmatism chart. | |||||||
* Produced accroding international stand GB11533-89. |