HEALTH AND SAFETY INFORMATION
Ultra - Violet Light
THE EFFECTS OF UV RADIATION ON THE EYE
The eye is the part of the body most at risk from Ultra -
Violet light, and is the greatest need of protection.
There are several problems that can occur;
(a) Photokeratitis (Inflammation of the Cornea)
(b) Conjunctivitis (Inflammation of the Conjunctiva)
(c) Retinal Lesions (caused by exposure to high intensity
sources)
(d) Yellowing of the lens
(e) Formation of Cataracts
Photokeratitis, Conjunctivitis and Retinal Lesions are acute effects, whereas Yellowing of the lens and Formation of Cataracts result
from long term exposure.
ARC EYE
Photokeratitis and conjunctivitis appear together and are
known as photokeratitis and conjunctivitis, or more commonly known
as; Welders Flash, Arc Eye and Snow Blindness.
SYMPTOMS OF ARC EYE
The symptoms are severe irritation, with a sensation of grit
in the eye, copious watering (lacrimation), aversation to
bright light (photophobia), and spasm of the lid muscles (plepharospasm).
There is also a reduction in visual acuity.
Photokeratitis has a latency period which may vary between
0.5 and 24 hours, but is commonly between 6 and 12 hours.
The delay in the appearance of the symptoms adds to the hazard,
as when the symptoms do appear it is to late to avoid their
cause.
The symptoms usually disappear after 24 to 36 hours with
no permanent effect.
PREVENTION
Wear eye protection (welding spectacles) when working with
UV and Bright light sources.
Do no look directly at UV lamps when energised (unless screened). |
