Axial Length Estimator

Estimate your child's eye length using prescription and corneal measurements from an eye examination. This tool provides an approximate result only. For an accurate axial length reading, ask your optometrist or eye clinic to measure it directly.

This measures the curve at the front of the eye. Your optometrist may have this from a scan or eye test.
Use the SPH value from your child's prescription.

Estimated eye length

Your result will appear here
Normal
Moderate
Elevated
This is an estimate based on population data and published modelling. Actual axial length may vary and should be measured clinically.
This estimate is not suitable for monitoring small changes over time.
Important: This tool gives an estimate based on prescription and corneal measurements. It is helpful for education, but it is not a substitute for a direct axial length measurement taken with specialist equipment. Click here for more information.
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