Air bubbles captured under the scleral lens is undesirable and will lead to wear discomfort and reduced acuity. There are two causes for captured air bubbles underneath the lens bowl:
Review the patient's insertion technique and make changes where necessary.
Air bubbles can seep in underneath the steep meridian of a scleral lens with insufficient sagittal toricity fitted on a highly toric sclera.
Increase the SAG@15 value of the steep meridian, which will increase the SAG of the Z-Zone and lower the SLZ down onto the sclera effectively sealing of tear and air inflow underneath the steep meridian.