title: Corneal topography and Schirmer testing in eyes with the Hudson-Stahli line.
abstract: OBJECTIVE
  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).
  
  
  CONCLUSIONS
  Formation of the Hudson-Stahli line may be dependent on the presence of normal tear secretion in the eye.
authors.affiliation: Sankara Nethralaya Medical Research Foundation, Chennai, India. mrf@sankaranethralaya.org
authors.forename: S K
authors.initials: SK
authors.lastname: Rao
authors.forename: V S
authors.initials: VS
authors.lastname: Ananth
authors.forename: P
authors.initials: P
authors.lastname: Padmanabhan
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016022:Case-Control Studies; D003316:Corneal Diseases / Q000473:pathology* / Q000503:physiopathology; D019781:Corneal Topography; D019573:Epithelium, Corneal / Q000473:pathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013666:Tears / Q000378:metabolism*