Rashdan H, et al. - Researchers used Fourier domain optical coherence tomography to compare biological variations in patients with clinically thin compared to normal corneal thickness values in healthy young adults. A total of 168 eyes from 84 patients (aged 19 to 38 years) were scanned using an Avanti optical coherence tomographer. Data reported that the average central corneal thickness for males was 540.5±32.0 μm and for females was 525.2±33.0 μm. Investigators found that all females with a central corneal thickness value of less than 500 μm exhibited bilaterally thin corneas, while two males showed a unilaterally thin cornea with a mean thickness values of approximately 500 μm. Findings revealed that there is a sub-population of healthy young adults that have clinically thin corneas. This emphasizes the importance of accurate measurements of corneal thickness before keratorefractive surgery and when assessing glaucoma intraocular pressure.