This is because they tackle histamine - a molecule produced by the body in response to an allergy which drives reactions such as sneezing, wheezing and itching.
The researchers, from The Catholic University of Korea, analysed 14,776 people from the health survey KNHANES-V, which was conducted by the Korean Centers for Disease Control and Prevention, and included residents of South Korea.
This may be due to the treatment only being applied to the skin, which may not be near the eye, rather than being more directly absorbed into the body.
Neither asthma, hay fever nor eczema are linked to glaucoma, which is defined as damage to the optic nerve due to the pressure of fluid inside the eye.
But histamine, the molecule to blame for these which is produced when the immune system picks up a threat, has been suggested to affect male libido as well as the number, shape and swimming ability of men’s sperm.