Serving Your Vision

Slit Lamp Microscopes - 700GL NSW Slit Lamp

The principle of NSW

When observing the fundus with a slit lamp microscope, the range obtained by the binocular vision is only the part where the right and left visual fields are overlapped (Stereoscopic Vision Area). This is because the larger the viewing angle becomes, the narrower the range obtained by binocular vision becomes.

By making this viewing angle at 4.1 degree, the area where the left and right visual fields overlap has been increased, and the range obtained by binocular vision becomes wider.


The difference between 700GL and 700GL NSW

  • 700GL’s viewing angle is set at 10 degree. In comparison with competitors slit lamps, 700GL offers a better view of the fundus and it is an excellent slit lamp microscope for general examination.
  • When NSW is turned ON, the viewing angle is set at 4.1 degree, which gives approximately 133% of the fundus view that 700GL offers. Therefore, it is a perfect slit lamp for doctors who frequently examine the retina of outpatients.

*700GL NSW is a factory option specification. Standard 700GL cannot modified/converted to 700GL NSW.

Small pupil observation without increased working distance

  • The NSW specification narrows the observation light path at the prism. Therefore, it can be used to patients with small pupil to observe the fundus with binocular vision.
  • Competitors’ similar devices make the Working Distance (distance between eyepieces and patient eye) longer by the thickness of devices. On the other hand, NSW specification allows to observe without increasing the Working Distance, which will reduce stress during observation.

Major Specifications

Microscope Type Galilean converging binocular stereomicroscope
Magnification change Five-position rotating drum
Eyepieces 12.5x wide-field, high-eyepoint
Total magnification 6x, 9x, 15x, 24x, 37x
Real field of view (diameter mm) Ø37.8, Ø25.2, Ø15.1, Ø9.5, Ø6.0 mm
Convergence viewing angle 12° Prism-OUT, 4.1° Prism-IN
Eyepiece convergence 6°
Objective lens configuration Three lens apochromatic
Interpupillary adjustment 52 – 82mm
Diopter adjustment range +/- 5 diopters
Base Unit Horizontal (coarse) movement 105mm
Horizontal (fine) movement 15mm
Vertical movement 30mm
Chinrest Unit Elevation stroke 85mm
Illumination Unit Slit width 0-14mm continuously variable
Aperture diaphragm (diameter) φ14, φ10, φ5, φ3, φ2, φ1, φ0.2mm
Filters Blue filter, Red free filter, Blue correction filter, Yellow filter
Light source LED
Power Unit Power supply AC100V – 240V (+/- 10%)
Power consumption DC5V 2A
Fixation Light Unit Fixation light source Red LED
Background Illumination Built-in
Weight 13kg


Optional Components