Lensmeters for measuring power, power distribution, refractive index, shapes of front and back surfaces and center of contact lenses, eyeglasses and optical lenses, not for medical use

'back':13 'center':16 'contact':18 'distribut':6 'eyeglass':20 'front':11 'index':8 'lens':19,23 'lensmet':1 'measur':3 'medic':26 'optic':22 'power':4,5 'refract':7 'shape':9 'surfac':14 'use':27

Keratoscopes; tonometers; eye testing machines and apparatus

'apparatus':7 'eye':3 'keratoscop':1 'machin':5 'test':4 'tonomet':2

A

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