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Predictive Nomogram for Large-Scale Childhood Myopia Screening and Intervention
Rohit Saxena1, Manasi Tripathi1, Amit Bhardwaj1
1Dr Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, Delhi, India.
Insights
This study found a clear link between uncorrected distance visual acuity (UCVA) and myopia in school children. A new nomogram can help predict myopia severity based on UCVA measurements.
Area of Science:
- Ophthalmology
- Pediatric Optometry
- Public Health
Background:
- Myopia is a growing concern in school-aged populations worldwide.
- Accurate assessment of refractive error is crucial for timely intervention.
- Understanding the relationship between visual acuity and refractive error aids in early detection.
Purpose of the Study:
- To investigate the correlation between uncorrected distance visual acuity (UCVA) and the degree of myopic refractive error.
- To develop a predictive tool for estimating myopic refractive error based on UCVA in children.
Main Methods:
- Prospective cohort study involving screening of school children for refractive errors.
- Analysis included 1463 children, excluding those with UCVA < 3/60.
- Linear regression used to plot UCVA against spherical equivalent (SE) and create a nomogram.
Main Results:
- A consistent correlation was observed between UCVA and the severity of myopic refractive error.
- A nomogram was developed to estimate the spherical equivalent (SE) based on UCVA.
- The nomogram provides a method for predicting myopic refractive error from visual acuity measurements.
Conclusions:
- A significant correlation exists between UCVA and myopic refractive error in school children.
- The developed nomogram can assist in predicting myopic refractive error using UCVA.
- Further large-scale validation studies are recommended for diverse populations.
Purpose:
To study the correlation between uncorrected distance visual acuity (UCVA) and myopic refractive error among school-aged children.
Methods:
The North India Myopia study is a prospective cohort study in which school children were screened for refractive error. These children were subsequently followed up to note the incidence and progression of myopia. The methodology of the study is as previously described. Children with UCVA < 3/60 were excluded for this analysis, since they are more likely to be associated with other ocular pathologies.
Results:
Of the 9884 children screened, 1463 children fulfilled the inclusion criteria for this analysis. UCVA was plotted against the mean prescribed Spherical equivalent (SE), with a 95% confidence interval. Marginal predictions of prescribed power according to UCVA were calculated using linear regression, enabling the development of a nomogram to estimate the closest SE based on UCVA.
Conclusion:
There is a steady correlation between the UCVA and degree of myopic refractive error among school going children. This correlation has been utilized to develop this nomogram that may help predict myopic refractive error on the basis of uncorrected visual acuity. Large scale studies are needed for the validation of this nomogram in different populations.
