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|Title:||Conjunctival and corneal conditions among myopic schoolchildren in Hong Kong|
|Source:||IMC 2010 13th International Myopia Conference 2010, July 26-29, 2010, Tubingen, Germany How to cite?|
|Abstract:||Purpose: To evaluate the presence and severity of papillae and corneal staining among Hong Kong myopic schoolchildren in order to provide a reference for fitting contact lenses to young children in myopia control clinical trial.|
Methods: Myopic children aged from 8 to 13 years were recruited for a 2-year myopia control study with soft contact lens since November 2007. The children had not worn contact lenses before. Slit-lamp biomicroscopy was performed on each subject to examine their external ocular health in order to provide a reference for selecting suitable candidates for myopia control study using contact lenses. Cornea and Contact Lens Research Unit (CCLRU) grading scales were used in grading the severity of corneal and palpebral conditions, i.e. central and peripheral corneal staining; papillae at upper and lower palpebral conjunctivae. The parents were also surveyed to assess the prevalence of allergic problems (eczema, asthma and rhinitis) among children.
Results: In total 781 schoolchildren were evaluated. Peripheral corneal staining (45.6%) were more common than central staining (7.6%). For the children with corneal staining, 13.8% and 25.4% of them showed moderate to severe (grade 2 or above) peripheral and central staining respectively. About one-tenth of the subjects had trichiasis, 37.3% and 17.4 % of them accompanied peripheral and central corneal staining respectively. Papillae were found to be very common in both upper (84.0%) and lower (94.4%) palpebral conjunctivae. About two-third of the subjects (67.5%) had papillae with grade 2 or above at lower palpebral conjunctivae whereas about 39.1% at upper palpebral conjunctivae. 40% children had allergic rhinitis as reported by their parents; 11.5% of those children required medication to relieve the symptoms and about 20% of them complained itching eyes. Eczema (10.6%) and asthma (3.2%) were found to be less common. Papillae (grade2 or above) was significantly associated with allergic rhinitis (p<0.000) and eczema (p = 0.008), but not with asthma. Only one-third (n = 221) of the children were finally selected to have contact lens trial fit for the myopia control study according to their external ocular health (EOH) condition.
Discussion and Conclusion: Papillae are common ocular allergic problems in Hong Kong schoolchildren, and are highly associated with allergic rhinitis. Contact lenses wear in young children needs to be cautious in particular if they already present signs of ocular allergy.
|Appears in Collections:||Conference Paper|
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