Cataract quantification using swept-source optical coherence tomography.
J Cataract Refract Surg
; 44(12): 1478-1481, 2018 Dec.
Article
in En
| MEDLINE
| ID: mdl-30392762
ABSTRACT
PURPOSE:
To develop and evaluate a cataract quantification method using a swept-source optical coherence tomography (SS-OCT) device (IOLMaster 700).SETTING:
Hanusch Hospital, Vienna, Austria.DESIGN:
Prospective multicenter case series.METHODS:
This study included patients with cataract in at least 1 eye. Two independent examiners performed Lens Opacities Classification System II (LOCS II) grading at the slitlamp independently. Corrected distance visual acuity, contrast sensitivity, and SS-OCT measurements were also performed. In addition, the phacoemulsification energy and time were recorded. To develop an objective SS-OCT-based cataract quantification system, all SS-OCT scans were segmented and the local pixel intensity unit of the lens was analyzed using Matlab's grayscale counting. The pixel intensity unit of the lens nucleus (OCT-based cataract quantification system score) was equated to the clinician's subjective nuclear opalescence grading.RESULTS:
The study evaluated 186 eyes (113 patients). The correlation between the independent examiners' LOCS grading was good (0.91) (P < .01). The correlation between the LOCS grading and OCT-based cataract quantification system score was 0.86 for examiner 1 and 0.76 for examiner 2 (both P < .01). In 24 patients, phacoemulsification time, power, and energy; visual acuity; and contrast sensitivity were available and included in the study. The OCT-based cataract quantification system scores correlated significantly with phacoemulsification time (0.71) and energy (0.64) (both P < .01).CONCLUSIONS:
Cataract density could be evaluated using an SS-OCT device, and the OCT-based cataract quantification system values correlated with the conventional LOCS II classification. Swept-source OCT measurements allowed quantification and documentation cataract density.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Cataract
/
Visual Acuity
/
Tomography, Optical Coherence
/
Lens, Crystalline
Type of study:
Clinical_trials
/
Observational_studies
Limits:
Female
/
Humans
/
Male
/
Middle aged
Language:
En
Journal:
J Cataract Refract Surg
Year:
2018
Document type:
Article