Objective: The aim of this study was to assess the effectiveness and reliability of magnification, DIAGNOdent in detection of smooth surface white spot lesions. Study design: Three hundred children aged 5-10 years were examined by two examiners for presence of smooth surface white spot lesions using naked eye and magnifying loupes in wet and dry conditions followed by DIAGNOdent analysis. Data was analysed using Cohen's kappa coefficient, Friedman test and Paired t test. Accuracy was assessed by sensitivity and positive predicted values. Results: Significant difference was found between naked eyes and magnifying loupes with and without air drying. While insignificant difference was found between DIAGNOdent and loupes. Conclusion: Magnifying loupes with air drying is an effective method in detection of smooth surface white spot lesion. Clinical significance: With the increased knowledge about the pathogenesis of dental caries and its ability to be remineralisable if detected early, makes it all the more important for the clinician to be vigilant in detection of early lesion to prevent the avoidable restorative approach for the same. Incorporation of magnification to routine dental examination by general dentist can help in early diagnosis and treatment of dental decay. This could prevent further progression of dental caries and reduces the incidence of tooth decay