Kowa SL-19 Hand-Held Slit Lamp

Brand: Kowa


Kowa's newest portable slit lamp "Kowa SL-19" is even lighter than the SL-17 and offers more functions for optimal stereoscopic viewing.

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Sophisticated design

  • Smooth and roundish design aimed to reduce stress and mental strain of patients.
  • Easy fitting with trigger grip and optimized grip diameter.

The lightest hand-held slit lamp in the Kowa SL series

  • By incorporating glass fiber reinforced resin, the weight was reduced.
  • The lighter device minimizes operator fatigue.

New functions

  • Background illumination simultaneously usable with slit lamp.
  • Blue light illumination button conveniently located on handle.
  • Continuously variable slit length. (1.5-12 mm)

Longer operating time

  • Owing to an energy saving system design, the KOWA SL-19 has a continuous illumination time at maximum intensity for 360 minutes.
  • When used with 3 x AA Ni-MH batteries. (1,900 mAh)



Angle of convergence 13°
10X and 16X
Working distance
Approx. 100 mm (at 10X magnification)
Approx. 80 mm (at 16X magnification)
Practical field of view
φ15 mm (at 10X magnification)
φ10 mm (at 16X magnification)
Interpupillary adjustment range
55 to 72 mm
Diopter adjustment range
-8 to +5 D

Slit Projector

Slit width / Shape 0.1, 0.2, 0.8 mm / Spots (circular)
Slit length
1, 5, 12 mm: fixed, and 1.5 to 12 mm: continuously variable
Spot size
φ1, φ5, φ12 mm and shapes of ellipse
Light intensity adjustment
200 to 20,000 lux: continuously variable
Slit’s illuminating angle
60° : horizontal circumference
Light source
White LED

Background illumination light White LED : 3 step switching
Blue illumination light
Blue LED : 3 step switching
Power Supply Input :
DC3.0 – 4.8 V
Power consumption :
Up to 3.6 VA
Dimensions / Weight
107 (W)×197 (D)×238 (H) mm / 620 g (No batteries)