HEINE SIGMA 250

Compact binocular indirect ophthalmoscope for mobile and professional fundus examinations

The HEINE SIGMA 250 is a compact binocular indirect ophthalmoscope designed for professional examination of the fundus, retina and retinal periphery. Unlike the headband-mounted OMEGA systems, the SIGMA 250 is worn in a lightweight spectacle frame.

This makes it particularly suitable for ophthalmologists and healthcare facilities looking for a lightweight, mobile and flexible solution for binocular indirect ophthalmoscopy.

Binocular indirect ophthalmoscopy in a spectacle-frame design

Stereoscopic viewing of the fundus

The SIGMA 250 enables binocular observation of the fundus, providing stereoscopic perception of retinal structures.

Its compact spectacle-frame construction offers a significant difference compared with conventional headband-mounted indirect ophthalmoscopes. There is no large headband, making the instrument particularly convenient for mobile and flexible use.

Typical applications include:

• ophthalmology practices;
• eye clinics;
• outpatient ophthalmology;
• hospital rounds;
• mobile ophthalmic examinations;
• examinations away from a fixed workstation.

Lightweight and compact

An alternative to conventional headband ophthalmoscopes

One of the defining characteristics of the SIGMA 250 is its compact construction.

Instead of a full headband, the observation and illumination unit is mounted on a spectacle frame. This keeps the system lightweight while providing the examiner with excellent freedom of movement.

For mobile examinations, hospital rounds or shorter examination sessions, this design can offer a significant practical advantage.

HEINE LEDHQ

Homogeneous illumination with natural colour rendering

The HEINE SIGMA 250 uses HEINE LEDHQ technology.

The LED illumination is designed to provide bright, homogeneous light with natural colour rendering during examination of the fundus.

In ophthalmic diagnostics, light quality is particularly important because subtle differences in colour and retinal structures should be represented as naturally as possible.

LEDHQ also provides a long operating life and reduces maintenance requirements compared with conventional lamp technologies.

Precise adjustment for different pupil sizes

Individually adjustable parallax and convergence

For good stereoscopic viewing, the observation and illumination beam paths must be adapted to the individual examination situation.

With the SIGMA 250, parallax and convergence can be adjusted independently.

This allows the optical system to be adapted to different patients and pupil sizes and is particularly useful when examining smaller pupils.

Adjustable interpupillary distance

Every examiner has an individual interpupillary distance. The SIGMA 250 can therefore be adapted to the user’s personal interpupillary distance.

The two observation optics can be positioned accordingly to provide comfortable binocular viewing.

This individual adjustment is particularly useful when the instrument is shared by several ophthalmologists within a practice or clinic.

Integrated filters

The SIGMA 250 provides different filters for ophthalmic examination.

These include:

• red-free filter
• cobalt blue filter

Red-free filter

The red-free filter enhances the contrast of selected retinal structures and can support differentiated observation of retinal blood vessels.

Cobalt blue filter

The cobalt blue filter extends the versatility of the SIGMA 250 with an additional specialised illumination option.

Adjustable illumination

The illumination can be adapted to the individual examination situation.

This allows the examiner to adjust the light according to pupil size, examination conditions and patient comfort.

The combination of LEDHQ, compact optics and adjustable illumination makes the SIGMA 250 a flexible instrument for professional binocular indirect ophthalmoscopy.

Use with condensing lenses

As with other binocular indirect ophthalmoscopes, examination is performed using a suitable condensing lens.

Depending on the lens selected, the following characteristics change:

• field of view;
• magnification;
• working distance;
• extent of the visible retinal area.

A 20 D condensing lens is a classic choice for general binocular indirect ophthalmoscopy. Other lens powers can be selected when a different balance between magnification and field of view is required.

Ideal for mobile examinations

Compact, portable and quickly ready for use

The SIGMA 250 shows its particular strengths in situations where a larger headband-mounted system is not required or desired.

Typical examples include:

• hospital rounds;
• mobile ophthalmology services;
• examinations at different clinical locations;
• emergency departments;
• examination of patients in bed;
• flexible use between several examination rooms.

Its compact spectacle-frame design makes the instrument particularly easy to transport and deploy.

Mobile power supply

The SIGMA 250 can be combined with a compact HEINE mobile power supply.

This complements the mobile concept of the instrument: the examiner remains independent of a stationary power source and can move freely during the examination.

The result is a highly flexible system combining spectacle-frame ophthalmoscopy, LEDHQ illumination and mobile power supply.

HEINE SIGMA 250, OMEGA 500 or OMEGA 600?

The three HEINE systems address different professional requirements. For product selection, their different concepts are particularly important.

HEINE SIGMA 250

The compact and mobile solution

Ideal for users looking for a lightweight binocular indirect ophthalmoscope without a conventional full headband.

HEINE OMEGA 500

The proven professional system

Designed for regular professional fundus examinations with a conventional headband concept and extensive adjustment options.

HEINE OMEGA 600

The current high-end solution

Designed for demanding users who prioritise advanced ergonomics, low weight and technologies such as visionBOOST.

The three systems therefore have a clear positioning: SIGMA 250 for mobility and compactness, OMEGA 500 as the proven professional system, and OMEGA 600 as the high-end solution.

Who should choose the HEINE SIGMA 250?

The SIGMA 250 is particularly suitable for:

• ophthalmologists;
• eye clinics;
• ophthalmology outpatient departments;
• mobile medical services;
• hospital rounds;
• emergency examinations;
• users who prefer a lightweight spectacle-frame system to a conventional headband.

Its strength is not in replacing the OMEGA series. Instead, it provides an independent compact concept for professional binocular indirect ophthalmoscopy.

Why choose the HEINE SIGMA 250?

The SIGMA 250 combines the diagnostic advantages of binocular indirect ophthalmoscopy with an exceptionally compact design.

Its key benefits include:

spectacle-frame design + low weight + stereoscopic fundus viewing + LEDHQ + adjustable parallax and convergence + mobile power supply

This positions the SIGMA 250 as a compact professional solution for ophthalmologists who require high mobility without giving up binocular indirect fundus examination.

Frequently asked questions about the HEINE SIGMA 250

What is the HEINE SIGMA 250?

The SIGMA 250 is a spectacle-mounted binocular indirect ophthalmoscope designed for professional fundus and retinal examinations.

What is the main difference between the SIGMA 250 and OMEGA 500 or OMEGA 600?

The main difference is the design. The SIGMA 250 is worn like spectacles, whereas the OMEGA 500 and OMEGA 600 use conventional headband systems.

Is the SIGMA 250 suitable for mobile examinations?

Yes. Its compact and lightweight construction makes the SIGMA 250 particularly suitable for mobile examinations and use at different examination locations.

Does the SIGMA 250 use LED illumination?

Yes. The SIGMA 250 uses HEINE LEDHQ for bright, homogeneous illumination and natural colour rendering.

Can parallax and convergence be adjusted?

Yes. Parallax and convergence can be adjusted to adapt the optical system to different examination situations.

Which filters are available?

The instrument includes a red-free filter and cobalt blue filter for different examination requirements.

Which condensing lens can be used with the SIGMA 250?

The appropriate lens depends on the required balance between field of view and magnification. A 20 D condensing lens is a classic choice for general binocular indirect ophthalmoscopy.

Is the SIGMA 250 a replacement for the OMEGA 600?

Not directly. The two instruments follow different concepts. The SIGMA 250 focuses on compactness, low weight and mobility, whereas the OMEGA 600 is positioned as a high-end headband-mounted ophthalmoscope for particularly demanding professional examinations.

HEINE SIGMA 250 at V-MEDTECH

At V-MEDTECH, ophthalmologists, eye clinics and specialist healthcare facilities can choose the HEINE SIGMA 250 binocular indirect ophthalmoscope for professional fundus and retinal examinations.

With its lightweight spectacle-frame design, stereoscopic viewing, HEINE LEDHQ illumination and mobile concept, the SIGMA 250 is an excellent solution for professionals who want to combine binocular indirect ophthalmoscopy with maximum flexibility.