When surgeons and medical professionals purchased their loupes in the past, they did not pay much attention to the construction of lenses. Hence, they never realized that fogging could be a point of concern here. With the rise of COVID-19, the environment has become quite challenging to deal with, especially when using loupes.
Read on to learn more about fogging in loupes and how to combat this problem.
Many medical professionals go through this nuisance of having their loupes, face shield, or glasses fogging up because of the mask. Let us have a look at what causes the problem and find ways to mitigate the same.
What causes fogging up?
Technically, the root cause behind finding fog in your loupes is temperature. Fog is formed due to the breath; unless the room's thermostat is set at 98 degrees. This means the equipment is at a lower temperature than the breath. When the warm breath hits the cooler surface, be it lenses, shield, or surgical loupes, it causes it to condense, ultimately resulting in fog on its surface.
The thing about breath is that you can't lower its temperature. Nevertheless, you can still take measures to combat your breath that hits your equipment and clouds your vision.
Wear a mask that is properly sealed
Some masks do not have a perfect seal around the top; such masks let your breath escape which directly hits your equipment. You can even seal the mask yourself with some tape, cloth, or foam when in urgency.
The poor visibility causes people to concentrate their attention directly ahead to see where they are going. This decreases the probability of seeing with the peripheral field so that, for example, it would be harder to see a car or pedestrian approaching from the side.
Rain also impairs vision in other ways. Rain affects the ability to see through the car windshield. Even with windshield wipers operating, the splashing of rain periodically blocks vision. The rain acts like a lens that scatters lights and distorts the visual scene image. The clutter and movement caused by the raindrops falling on the windshield further draw attention and mask objects on the road. Wipers are never 100% efficient and typically leave a smear of water across the windshield. Lastly, wipers only sweep part of the visual field clean of rain.
Rain affects visibility by changing the amount of light reflected from the road back to the driver's eye. Rain makes road delineations, such as crosswalks less visible. The paint used in making road markings has a reflectorized material. In dry conditions, headlight illumination bounces off the reflective paint back to the driver's eyes. However, water acts like a lens that disperses the lights so that much of it is reflected in different directions. As a result, the lines become almost invisible to the driver.
A normal road has a rough surface, which causes some of the headlight beam to reflect. The same effect makes the road appear darker. Fog is hazardous sometimes.
Fogging with surgical loupes has been an issue for many years. However, in these 10-12 months, fogging with even the best surgical loupes has become a serious issue with face shields, face masks, extra PPP, and varying room temperatures.
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