refractive
1.refractive errors
2.refractive index
3.measurement of refractive index
5.Binocular vision in refractive accommodative esotropia.
6.radio-wave refractive index of air
8.for measuring the refractive index of a substance.
9.optical glass of low dispersion and low refractive index.
10.On Water holdup Meter Based on Refractive Index Modulation
