Corneal hysteresis has been found to be age dependent in a study published in this month's Clinical and Experimental Ophthalmology Journal.
The study looked at the changes in intraocular pressure, anterior chamber depth and hysteresis in eyes of various ages. Corneal hysteresis is a measure of the flexibility of the eye as it is deformed and allowed to recover its original shape. It is related to the hydration of the cornea and has a significant impact on tonometry measurements.
The study suggested that the flexibility decreased with age and the change was independent of IOP and anterior chamber depth.