|LETTER TO EDITOR
|Year : 2020 | Volume
| Issue : 3 | Page : 413-414
A simple solution to fogging inside goggles used as a part of personal protective equipment
Rahul K Anand, Bikash R Ray, Dalim K Baidya, Sulagna Bhattacharjee, Souvik Maitra
Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, New Delhi, India
|Date of Submission||15-Jul-2020|
|Date of Acceptance||29-Jul-2020|
|Date of Web Publication||15-Sep-2020|
Dr. Souvik Maitra
Assistant Professor, Room No: 5013, Teaching Block, Department of Anaesthesiology, Pain Medicine and Critical Care, All India Institute of Medical Sciences, Ansari Nagar, New Delhi - 110 029
Source of Support: None, Conflict of Interest: None
|How to cite this article:|
Anand RK, Ray BR, Baidya DK, Bhattacharjee S, Maitra S. A simple solution to fogging inside goggles used as a part of personal protective equipment. J Anaesthesiol Clin Pharmacol 2020;36:413-4
|How to cite this URL:|
Anand RK, Ray BR, Baidya DK, Bhattacharjee S, Maitra S. A simple solution to fogging inside goggles used as a part of personal protective equipment. J Anaesthesiol Clin Pharmacol [serial online] 2020 [cited 2020 Nov 25];36:413-4. Available from: https://www.joacp.org/text.asp?2020/36/3/413/295111
Goggles are recommended for protection of eyes from the SARS-CoV-2 virus both by the Center of Disease Prevention and Control and World Health Organization, but fogging inside the goggles is common. Fogging inside goggles decreases quality of vision and performance ability of the healthcare worker potentially compromising quality of clinical care. The exact cause of fogging is not known. The leaking of expired air into the goggles may be the culprit. However, fogging happens frequently even after using N95 facemask with proper fitting. The temperature difference between the outer and inner surface of the goggles is responsible for the condensation of water and, hence fogging. Warm expired air causes condensation of water droplets to accumulate in the relatively cooler surface of goggles. We are hereby reporting a simple and effective solution for fogging in this scenario.
We are using a commercially available polypropylene-based anti-fogging solution [Nabaiji Swimming Goggles Anti-Fog Marker, imported by Decathlon Sports India Private Limited, Bangalore] for reducing fogging inside the goggles used as a part of personal protective equipments (PPE). The package insert of the antifogging marker suggests that it's applied on the inner surface of the goggles and to be dried for 1 minute. We paint the entire inner surface of the goggles with the antifogging marker and after drying, wear it in the usual fashion [Figure 1]. The goggles should be immersed in the water before wearing so that the anti-fogging marker is evenly applied. However, we are using it without immersing the goggles into water and in our experience, fogging is minimal up to >4h of use at least.
The anti-fogging marker contains propylene glycol butyl ether, 2- (2-butoxyethoxy) ethanol, fluorocaliphatic oxyethylene, potassium hydroxide, and magnesium lauryl sulfate. It is postulated that antifogging chemicals decreases surface tension between two liquids and a liquid and solid, thereby reducing the condensation of water droplets.
Financial support and sponsorship
Conflicts of interest
There are no conflicts of interest.
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