YZ-24（Streak Retinoscope）

• The well-positioned filament can be rotated 360° and move upward and downward. The brightness of the streak can be adjusted.

• Quickly and precisely measure the astigmatism axis.

• The light can be converged, radiated and paralleled.

• Automatic turning off effectively protects the bulb.

• Two-steps adjustable brightness for bulb: S(Bright),W(Dark).