Photophthalmia ( pho·toph·thal·mia (fōt″of-thal´me-ah) ) is ophthalmia or inflammation of the eye, especially of the cornea and conjunctiva due to exposure to intense light of short wavelength (as ultraviolet light), as in snow blindness.[1]
It involves occurrence of multiple epithelial erosions due to the effect of ultraviolet rays, especially between 311 and 290 nm. Snow blindness occurs due to reflection of ultraviolet rays from snow surface. Photoretinitis is another form that can occur due to infra-red rays (eclipse burn of retina).
Presentation
editIt can present with the following:[2]
- severe burning pain
- lacrimation
- photophobia
- blepharospasm
- swelling of palpebral conjunctiva
- retrotarsal folds
Usually the effect of UV exposure is felt after 6-8 hours from exposure. With severe irritation, the eyes become blood red. In minor cases, avoid rubbing and wash the eyes thoroughly with water until the irritation subdues. Always consult an eye specialist as soon as possible. Medications (for minor erosion of cornea) usually involve eye drop such as Hydroxypropyl Methycellulose Ophthalmic solution USP sold under the trade name GenTeal®. (February 2019)
Prevention
editCrooke’s glass[3] is a prophylactic aid consisting of a spectacle lens combined with metallic oxides[4] to absorb ultraviolet or infrared rays[5] and should be used by those who are prone to exposure e.g. Welding workers, cinema operators.
Treatment
editThe following may provide relief:[6]
- Cold compresses
- Pad and bandage with antibiotics drops for 24 hours, heals most of the cases
- anaesthetic drops should not be used
- Oral analgesics if pain is intolerable
- Single dose of tranquilizers
References
edit- ^ "photophthalmia". Merriam-Webster.
- ^ H. V. Nema; Nitin Nema (1 December 2011). Textbook of Ophthalmology. JP Medical Ltd. p. 157. ISBN 978-93-5025-507-0.
- ^ "Colorless crookes glass US 1634182 A". Google Patents. Retrieved 26 April 2015.
- ^ William Hodson Brock (2008). William Crookes (1832-1919) and the Commercialization of Science. Ashgate Publishing, Ltd. p. 464. ISBN 978-0-7546-6322-5.
- ^ "Crookes glass". medilexicon.com. Archived from the original on 2016-08-06. Retrieved 2015-04-26.
- ^ Ilkka Kunnamo (4 March 2005). Evidence-Based Medicine Guidelines. John Wiley & Sons. p. 1211. ISBN 978-0-470-01184-3.