Simply by replacing Keeler Vista or Combi Retinoscope Bulb, you will have a Keeler streak or spot Retinoscope. Keeler use different bottom color for different voltage.(2.8V= Blue, 3.5V= Red)
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Simply by replacing Keeler Vista or Combi Retinoscope Bulb, you will have a Keeler streak or spot Retinoscope. Keeler use different bottom color for different voltage.(2.8V= Blue, 3.5V= Red)