Mini Loupes are designed to be ultra light and comfortable.
Standard Loupes : larger field of view and a two lens system
Hi-resolution Loupes : bright image and larger field of view.
Prismatic Loupes : higher magnification and field of view.
TYPES OF SURGICAL LOUPES
Great field of view
Mini Loupes are designed to be ultra light and comfortable with minimal compromise in field of view.
Working distance and field of view
|Working Distance||Field of view|
All round performance
Larger field of view
Two lens system
Weight – loupes on bar 46g
|Magnification||Working Distance||Field Of View|
HIGH RESOLUTION LOUPES 3.0X Four lens high index coated optical system.
|Working Distance||Field Of View|
PRISMATIC LOUPES 5.5x have a more sophisticated multi component optical system.
The prismatic loupes use a double or Schmidt-Pechan prism to extend the optical path without significantly increasing the length and weight of the telescope body
|Magnification||Working distance||Field Of View|
Keeler loupes are flip-up design loupes only, not the TTL loupes
In Zeiss The GTX Loupes aren’t TTL so would be classified as FLM and the others as Flip Ups.
The Flips Ups are adjustable as the GTX are not.
The main brands of loupes in Australia are SurgiTel, Zeiss, Orascoptic,Heine and Keeler. Newer brands include Pentax, Bryant dental and Perioptix.
Orascoptic only do TTL (Through The Lens) Loupes. They do not do FLM (Front Lens Mount). Surgitel offer both TTL and FLM options There are benefits to both TTL and FLM
Galilean telescopes are small and lightweight due to their rather simple optical design.
Keplerian telescopes are longer and heavier as they incorporate prisms to reorient what would otherwise be an upside down and inverted image.They give wider field of view and higher magnification.
Keeler surgical loupes have high quality Schott glass and choices of flexible hinges providing a large range of declination to meet procedure and posture needs.
For the spectacle wearer you have a choice of wearing your spectacles under the Keeler frame or using the RX lens holder for your prescription lenses
We can advise recommended working distances based on your height,prescription and posture.
SURGICAL LOUPE FRAMES
Frames need to be suitable for the loupe.
Wrap frames properly designed are often used,with safety shields.
Protection by lightweight plastic splashguards can be easily detached when not required.
The Keeler headband offers adjustable nose pads.
Protective and 1 dioptre distance caps protect the front lens. Powered caps will allow even more magnification but will change working distances.
The loupes removable flip lever and protective caps are easily removed and are designed to be autoclaveable to ensure bio safety.
The correct posture, viewing angle and ability to see normally are the benefits of ‘flip up’ loupes as a three way adjustable hinge allows positioning as required.
TTL LOUPES VERSUS FLM LOUPES
Orascoptic only do TTL (Through The Lens) Loupes. They do not do FLM (Front Lens Mount). Some companies eg Surgitel to offer both. There are benefits to both TTL and FLM. TTL allows the ocular to be closer to the eye thereby providing a larger field of view. They are also set in one position so no adjustments to be made. TTL loupes are custom made for each client. FLM loupes are adjustable and they offer a high declination angle which reduces head tilt.
The manufacturing process of TTL loupes is very complicated and the loupes will only fit the measured client. The height of the ocular in the frame is dependent on the bridge of the nose and how the frame sits on the clients face. The width between the oculars depends on the clients inter pupillary distance and the eyes are also not always symmetrical on both sides of the nose so there is a left and a right side measurement. The angle that the oculars are mounted in the glass is related to the working distance for the client and the two images need to ‘converge’ at the correct distance to give one single image. This will also vary depending on the prescription for the client. The convergence will also vary depending on the head width of the client as the head width will ‘flex’ the frame when they are being worn and this will change the convergence angle. These measurements are critical to getting a working solution with TTL loupes and the measurements become more critical with higher magnifications. That’s why FLM loupes are so easy as most of these things (except convergence) can be adjusted by the user.
To fit oculars into a prescription lens, a CNC machine to mill the holes (not done in Australia) and a laser alignment bench to align the oculars before gluing is required. Zeiss loupes eg can be cemented to the front of the lens and can be removed and realigned if required
SURGICAL LOUPE ILLUMINATION
The Keeler Loupe Light is one of the smallest and lightest available.. The LED illumination gives 34000 Lux of homogenous white light, ideal for both surgical and dental use, while coaxial illumination ensures shadow free viewing.
An optional yellow filter avoids the premature hardening of composites.
Lithium-ion battery will give up to 7 hours continuous use before a recharge is required.