This refers to the ability of a lens to focus on objects, both near and far, without needing to change position. When magnification is used it restricts the depth of field and as the magnification increases the depth of field decreases, until a point at which only a small object is in sharp focus. At high magnification just a small movement from the patient or the clinician will result in losing focus, making working more challenging.

High-performance oculars can provide an extra-large depth of field (up to 120 mm).
• Short 28-38cm
• Regular 36-46cm
• Long 43-53cm
• X-Long 50-60cm
When purchasing loupes you should also consider the following…

Resolution:
The ability to differentiate images that are separated by small distances and to detect fine details.

Colourmetric Shift:
Longitudinal Chromatic Aberration, also known as “LoCA” or “bokeh fringing”, occurs when different wavelengths of colour do not converge at the same point after passing through a lens. Because each colour has a different wavelength, uncorrected optics cannot focus on the different wavelengths in different points in space.

Deformation of the image:
An object that is seen with a magnifying glass that has a spherical aberration, appears bent or spheric. The lines are not straight.
The basic principle for field of view is that as the magnification increases, the field of view decreases. In practical terms a magnification of 2x – 2.5x would enable the clinician to see multiple quadrant areas in focus and this is the magnification used by most general practitioners. Once a magnification of 3.5x is reached, the field of view becomes more restricted, usually to a single quadrant. However, this ability to focus on a particular area, often on a single tooth, makes this type of magnification suitable for specific procedures such as endodontics.
Weight and balance are vital for operator comfort and this is an important consideration for those wearing loupes constantly throughout the working day. The type of lens (Galilean or Prismatic) and design of the loupes all play a part in weight and balance considerations.
Galilean Lens:
This is the most common type offering magnification of 3.5x or less. The lightweight design offers good field-of-view and good depth-of-field in a short compact design.

Prismatic Lens:
Much higher magnification (up to 8x) provides the sharpest image possible, within a short depth-of-field. However, this is compensated by longer and therefore heavier lenses. These are suitable for specialists requiring great detail and clarity within a small area.

Range of Loupes

PeriOptix® Through-the-Lens Loupes



PeriOptix optics are made with high-end, shatter-resistant glass to ensure optimum edge-to-edge clarity in a large viewing field. These lightweight premium through-the-lens (TTL) loupes have extremely precise optical quality and a large field of view making them comfortable, easy to use, and carefree.


    
    
  • Adjustable to all users
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  • Variable declination angle
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  • Less expensive (-15 to 20%)
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Frames
No feature is more important for comfort of the operator than the frame. PeriOptix frames have a wide variety of styles and adjustments, providing comfort, customisability and style.
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Firefly® Cordless Headlight System



Easily upgrade your loupes to incorporate a Firefly cordless headlight and enjoy the freedom to move through any procedure with confidence.

    
    
  • Eliminates heavy power packs and annoying cords
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  • Easy to clean, reducing the risk of cross-contamination
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  • Provides a well-defined and uniform spot with natural colour output
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  • Light Intensity: 2 settings — high 32,000 lux and low 20,000 lux
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  • Weight: 28 grams
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  • Field Illumination: 70 mm
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  • Available in black, red and blue
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LumiPro Headlight System



This innovative light (with cord) maximises clarity, ergonomics and control alongside the following benefits:


    
    
  • Uniform output of natural, bright light
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  • Enhanced spot size to illuminate the entire oral cavity 
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  • Significantly smaller and lighter than most headlights in the market
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  • Easy-to-use soft-touch on/off and intensity adjustments to reduce the need to deglove
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  • 10+ hours of run time on high
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Pupillary Distance (PD)
This is the measurement, in millimeters, between the centers of the pupils in each eye. This measurement only takes a couple of minutes.
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Working Distance
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