Allegra 900

Build your ideal system for cataract surgery

With a brilliant, fixed red-reflex, the ALLEGRA 900 is engineered for cataract surgery. This simple, effective microscope for anterior segment surgery features legendary Haag-Streit optics, a large depth of field, and the best 3D perception on the market.

See what you've been missing

Haag-Streit Allegra 900 microscope for cataract surgery on its stand
Close up of Allegra 900 with stereoscopic observer scope
Features & Benefits

A highly configurable microscope

This microscope features:

  • 25 mm stereo base
  • C.RED
  • Fixed red reflex
  • Halogen or LED lighting systems
  • Full tilt range for iStent procedures
  • Wireless foot switch
  • Integration with ORA, Holos, and other third party systems
  • Manual five-step magnification
  • Optional X-Y coupling
  • Optional: EIBOS 2 compatible – posterior segment surgery

Get a look.



Features and Benefits

Enables documentation and co-observation

ALLEGRA 900 uses beam splitters that can be fitted with adapters for various video and still cameras. It also includes a stereoscopic observer scope. A single-CCD video camera is also available for integration to reduce the microscope’s length.

See what you’ve been missing.

Viewing monitor
Allegra 900 beam splitter

Beam Splitters & Scopes

Beam Splitters
You can choose from two available splitting ratios according to your application:

  • 50:50 – for adaptation of stereoscopic observer scopes and/or cameras
  • 30:70 – for adaptation of several cameras

Stereoscopic Observer Scopes
Choose from two different stereoscopic observer scopes. These accommodate laterally placed assistants.

  • Includes fixed eyepiece head (standard)
  • Optional inclinable eyepiece head

Explore the Allegra 900 further.





A broad selection of analog or HD video and still cameras can be mounted onto microscopes.

You can also add the MIOS 5, which allows you to handle patient names, record HD videos and pictures as well as administer archived data.

Camera controls
EIBOS 2 opthalmoscope


Our non-contact wide-angle ophthalmoscope, EIBOS 2, is an important option for vitreoretinal surgery.



Designed for the optical evaluation of the cornea’s topography using fixation light.

Lenstar viewing monitor

LENSTAR Viewing Monitor

Haag-Streit’s connectivity pairs up LENSTAR (the ultimate surgical planning tool) and our ophthalmic surgical microscope to give you even more precision. The LENSTAR viewing system lets you view images obtained through LENSTAR on the integrated remote viewing station on the HS microscope. Now you can plan your procedure and view it on a screen rather than a printout.

Coupled with the microscope’s outstanding red reflex and optics that deliver a significant increase in depth of field, the LENSTAR Viewing system helps you operate with confidence.


Stands made for use with the Hi-R NEO 900 microscope include:

Ceiling units/installation are also available. These easily movable stands feature:

  • Friction or electromechanical brake systems
  • Halogen or LED lighting
  • Long arm reach
  • Concealed cabling
  • Powered shelves to support external devices

See the Haag-Streit difference.

FS 1-12 microscope stand
FS 2-11 / FS 2-15 microscope stand
FS 2-21 / FS 2-25 microscope stand

Technical Data

Working distance200 mm, optional 175 mm, 225 mm, 250 mm, 300 mm, 400 mm
Stereo base25 mm
Filter disk2 diaphragms, 5 color filters
FocusingMotorized 50mm
MagnificationMotorized zoom 1:6, 4.3x to 25.7x
Diameter visual field8.2mm to 49.0mm
Illumination field3.0mm to 60.0mm
Binocular0-160° inclinable with 10x eye piece
Objective lensF=200mm or f=175mm
Inclination-70° to +90°
X-Y coupling60mm x 60mm
Light sourceHalogen or LED
Light filtersUV, softlight, daylight, blue, slit, 2 diaphragm sizes
Optional monitorFull HD 1080p