Lens Opacities Classification System III: cataract grading variability between junior and senior staff at a Singapore hospital.
ABSTRACT To test the reliability of the Lens Opacities Classification System III (LOCS III) cataract grading between observers at different levels of ophthalmology experience.
Ophthalmology Department, National University Hospital, Singapore, Singapore.
In this comparative study, a non-ophthalmology trainee, a basic ophthalmology trainee, and an ophthalmology consultant graded cataracts in 28 patients preoperatively. The observers had a meeting to discuss their interpretations of the LOCS III manual to standardize the grading system and then graded 37 additional patients.
There was a statistically significant increase in inter-observer agreement in all 3 LOCS III categories after standardization of the LOCS III system. The kappa values after standardization fell in the moderate (0.41 to 0.60) to substantial (0.61 to 0.80) range. There was no statistically significant relationship between the observer's experience and the kappa values.
There was an increase in inter-observer agreement in all categories after standardization between operators.
- SourceAvailable from: Ruth Lapid-GortzakExpert Review of Ophthalmology 01/2014; 4(5).
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ABSTRACT: Purpose: To investigate the effect of chronic cigarette smoking on lens density by Pentacam HR lens densitometry in young adults.Methods: Sixty chronic smokers who smoked at least 10 cigarettes per day for at least 2 years and 60 age- and sex-matched healthy control subjects were included in this prospective cross-sectional, comparative study. Presence of an ocular or systemic disease that might affect lens were determined as exclusion criteria. All individuals underwent complete ocular examination. Lens densitometry (LD) measurements were performed with Pentacam HR (Oculus, Wetzlar, Germany), dividing the lens into 3 areas: anterior area (anterior subcapsular and anterior cortical), nuclear area, and posterior area (posterior subcapsular and posterior cortical). Three-dimensional scan modes were used for measurements.Results: The mean ages of group 1 and 2 were 25.85 ± 4.32 and 25.60 ± 5.14 years, respectively. The mean LD values in the 3 areas were higher in group 1 than group 2. However, only the mean LD value at the anterior area of group 1 was found to be statistically significantly higher (p = 0.047). There was no statistically significant difference in the mean LD measurements at the nuclear and posterior areas between the groups.Conclusions: Our study demonstrated that the mean LD value of the anterior area was significantly higher in group 1, suggesting that chronic smoking may contribute to anterior cortical and subcapsular cataract development in young adults.European journal of ophthalmology 03/2014; 24(5). · 1.06 Impact Factor
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ABSTRACT: Cataract affects more than 20 million people worldwide and is the leading cause of vision loss. Currently, the phacoemulsification is the most used procedure to extract cataract and recover visual acuity. Optimal phacoemulsification energy is demanded for safety cataract removal. It is well established that the energy value is determined by the cataract hardness. In this study twenty porcine eyes were used as experimental samples. Cataract was induced by an ethanol:2-propanol:formalin solution. A 25 MHz focused transducer has been used to estimate the ultrasound velocity and attenuation. Statistical analysis was performed to compare the different used methodologies and to correlate the different ultrasound parameters with different stages of cataract formation (lens hardness).IEEE International Ultrasonics Symposium (IUS), Dresden, Germany; 10/2012