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Corneal topography and Schirmer testing in eyes with the Hudson-Stahli line
S K Rao1, V S Ananth, P Padmanabhan
1Sankara Nethralaya Medical Research Foundation, Chennai, India. mrf@sankaranethralaya.org
Purpose:
To evaluate corneal topographic features and tear secretion in eyes with the Hudson-Stahli line.
Methods:
Keratometry, computerized videokeratography and Schirmer testing were performed in 50 cases with bilateral Hudson-Stahli line, and 55 controls without the Hudson-Stahli line. Similar tests were performed in 21 subjects with unilateral Hudson-Stahli line.
Results:
Corneal topographic features and keratometry in the horizontal meridian were similar in cases and controls, and in fellow eyes of subjects with unilateral Hudson-Stahli line. Keratometry in the vertical meridian in cases (43.01 +/- 2.01) was significantly lesser than in controls (43.94 +/- 1.77) (P = 0.01). This value was not different in fellow eyes of patients with unilateral Hudson-Stahli line. Schirmer testing revealed significantly greater tear secretion in cases (16.72 +/- 4.99 mm) compared to controls (12.57 +/- 3.62 mm) (P < 0.01). In subjects with unilateral Hudson-Stahli line, mean Schirmer values in the eye with the line (17.52 +/- 6.86 mm) were significantly greater than in eyes without (13.67 +/- 4.64 mm) (P = 0.04).
Conclusion:
Formation of the Hudson-Stahli line may be dependent on the presence of normal tear secretion in the eye.
