Digital image capture and quantification of subtle lens opacities in rodents.
J Biomed Opt
; 9(1): 116-20, 2004.
Article
in En
| MEDLINE
| ID: mdl-14715062
ABSTRACT
A rapid, sensitive, and cost-effective method is reported for the subjective and objective documentation of subtle opacities in lenses of unanesthetized transgenic mice or selenite-injected rat pups as models for cataract formation. Animal eyes were dilated with eye drops and the animal was positioned in front of a Nikon FS2 photo slit lamp. Slit-lamp observations were recorded using a Canon Optura Pi digital video recorder. High-quality images of opacifying lenses were captured from the video and quantified using densitometry at progressive stages of opacification. In mice, targeted genomic deletion of the proteins CP49 (a lens-specific filament) or Six5 (a model for myotonic dystrophy) resulted in subtle cataracts that were easily recorded and quantified using this instrumentation. In rats, the early progressive changes leading to a dense nuclear opacity caused by selenite injection were easily documented using this instrumentation. Low-cost components combined with a conventional slit-lamp ophthalmoscope were used to capture high-quality images of selected stages of cataract formation for quantitative analysis using commercial software.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Refraction, Ocular
/
Cataract
/
Signal Processing, Computer-Assisted
/
Image Interpretation, Computer-Assisted
/
Microscopy, Video
Type of study:
Evaluation_studies
/
Prognostic_studies
Limits:
Animals
Language:
En
Journal:
J Biomed Opt
Journal subject:
ENGENHARIA BIOMEDICA
/
OFTALMOLOGIA
Year:
2004
Document type:
Article
Affiliation country:
United States