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Incidence and severity of keratoconus in Asir province, Saudi Arabia
  1. A A Assiri1,2,
  2. B I Yousuf2,
  3. A J Quantock1,
  4. P J Murphy1
  1. 1Cardiff University, School of Optometry and Vision Sciences, UK
  2. 2Asir Central Hospital, Department of Ophthalmology, Saudi Arabia
  1. Correspondence to: Abdullah M Assiri Cardiff University, School of Optometry and Vision Sciences, Redwood Building, King Edward VII Avenue, Cathays Park, Cardiff CF10 3NB, UK; assiriacf.ac.uk

Abstract

Aim: To assess the incidence and associated signs and symptoms of patients with keratoconus in Asir Province, Saudi Arabia.

Methods: 125 new keratoconus patients (51 male, 74 female; mean age 18.5 (SD 3.8) years; range 8–28 years) were recruited from referrals to the department of ophthalmology, Asir Central Hospital, over a 1 year period. Age, visual acuity, and keratometry were recorded along with clinical signs and symptoms.

Results: The incidence of keratoconus in Asir Province is 20 cases per 100 000 population. Also, the disease severity is high, as indicated by an early mean age (17.7 (3.6) years) with advanced stage keratoconus. Visual acuity, with either spectacles or rigid contact lenses, was 6/12 or better in 98% of eyes measured. Just over half (56%) of patients had atopic ocular disease. 16% of patients had a positive family history of the disease and 16% had atopic dermatitis (eczema and/or vitiligo).

Conclusion: The incidence and severity of keratoconus in Asir Province, Saudi Arabia, is high with an early onset and more rapid progress to the severe disease stage at a young age. This might reflect the influence of genetic and/or environmental factor(s) in the aetiology of keratoconus.

  • keratoconus
  • cornea
  • Saudi Arabia
  • ultraviolet radiation
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    • view PDF - Figure: Scatter plot illustrating visual acuity against keratometry measurements. (A,B) Visual acuity decreases with increasing corneal curvature. (C,D) Visual acuity decreases with increasing corneal astigmatism, although only with a weak relation.

Footnotes

  • Supported by the Ministry of Health, and Asir Central Hospital, Department of Ophthalmology, Kingdom of Saudi Arabia.

  • Competing interests: none declared

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