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An Accurate Method to Determine Bowmans Layer Thickness In Vivo in the Human Cornea
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- Germundsson, Johan (author)
- Linköpings universitet,Institutionen för klinisk och experimentell medicin,Hälsouniversitetet
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- Fagerholm, Per (author)
- Östergötlands Läns Landsting,Linköpings universitet,Oftalmiatrik,Hälsouniversitetet,Ögonkliniken US/LiM
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- Koulikovska, Marina (author)
- Östergötlands Läns Landsting,Linköpings universitet,Oftalmiatrik,Hälsouniversitetet,Ögonkliniken US/LiM
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- Association for Research in Vision and Ophthalmology (ARVO), 2012
- 2012
- English.
- In: Investigative Ophthalmology and Visual Science. - : Association for Research in Vision and Ophthalmology (ARVO). - 0146-0404 .- 1552-5783. ; 53:4, s. 2354-2359
- Journal article (peer-reviewed)
Abstract
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- PURPOSE. To determine an accurate value for Bowmans layer (BL) thickness in vivo in humans. less thanbrgreater than less thanbrgreater thanMETHODS. Seventeen corneal transplant patients were examined preoperatively by laser-scanning in vivo confocal microscopy (IVCM), and corneal buttons were removed post-operatively and sectioned for light microscopy (LM). Nine corneas with uniformly thick BL by LM were used for thickness measurement. In the uniformly thick samples, probable overestimation of BL thickness in vivo by a first in vivo method (Method 1) led to the development of a revised in vivo method (Method 2). Method 2 was used to measure BL thickness in 20 healthy volunteers. less thanbrgreater than less thanbrgreater thanRESULTS. In nine patients, mean BL thickness prior to transplantation was 13.7 +/- 1.6 mu m by IVCM (Method 1) while BL thickness of the removed corneal button was 9.7 +/- 1.7 mu m by LM (P andlt; 0.001). The correlation of BL thickness between IVCM (Method 1) and LM was poor (P = 0.226). In 20 right eyes of 20 normal corneas, both in vivo methods were used to determine BL thickness. Mean BL thickness by Method 1 was 13.2 +/- 1.6 mu m and by Method 2 was 9.1 +/- 1.4 mu m (P andlt; 0.001). BL thickness measurements by both in vivo methods were highly correlated (P andlt; 0.001). less thanbrgreater than less thanbrgreater thanCONCLUSION. BL thickness by a revised in vivo method was close to LM values in this study and to values reported in fixed tissue in other studies. The authors believe this revised method provides the most accurate estimates of BL thickness in vivo to date.
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