2021, Number 5
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Rev Fac Med UNAM 2021; 64 (5)
Dry eye syndrome. A literature review
Mendoza-Aldaba II, Fortoul TI
Language: Spanish
References: 19
Page: 46-54
PDF size: 341.90 Kb.
ABSTRACT
Air pollution is continuously present as its sources have increased.
In the season of high insolation, scarce wind, and
lack of rain there is an increase in the signs and symptoms of
high concentrations of pollution, mainly there is an increase
in respiratory symptoms, but little has been reported from
the eye, which is directly exposed to the environment. Dry
eye syndrome (SOS) is defined as “a multifactorial disease
of the tears and ocular surface that results in symptoms of
ocular discomfort, impaired vision and instability of the tear
film with potential damage to the ocular surface”.
Around 5 to 34% of the world population suffers from SOS
and the prevalence increases with age, being more frequent
in women (2:1). Risk factors include hormonal changes, nutritional
deficiencies, air pollution, dyslipidemia and obesity.
Environmental factors such as decrease in atmospheric humidity,
prolonged exposure to screens, air purity, extreme
temperatures, UV radiation and high levels of particulate matter
(PM) participate in the same way.
SOS is a multifactorial disorder. It is divided into 2 groups:
“dry eye with poor tear production (aqueous-deficient)” and
“dry eye with increased evaporation of the tear film (hyperevaporative)”
and the mixture of both types, hyperevaporative/
deficient aqueous, are more than 80% of the cases.
The most frequently reported symptom is a foreign body
sensation. They also report burning, itching, excessive mucus
secretion, not being able to secrete a tear, burning sensation,
photosensitivity, red eye, pain, and blurred vision. The
diagnosis of SOS is made by the clinical history, physical examination
and symptoms reported by the patient. Treatment
requires proper diagnosis of the cause and to decrease the
different components that cause the symptoms. It is important
to apply treatments that reduce the dysfunction of the
meibomian glands, which are a relevant component in the
pathophysiology of this disease.
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