What is the appropriate axis to order for a soft contact lens fitting with the given parameters?

In soft contact lens fitting, the axis is crucial for ensuring proper alignment of the lens with the astigmatic cornea and achieving optimal visual acuity. The axis parameter is measured in degrees and indicates the orientation of the cylindrical correction needed for astigmatism.

The choice of 110 degrees suggests that this specific angle provides the best alignment for the lens in relation to the corneal surface and any astigmatism present. It is likely chosen based on clinical measurements taken during the fitting process, such as keratometry or topography, which identify the steepest and flattest meridians of the cornea.

Proper alignment at 110 degrees maximizes the effectiveness of the lens in correcting vision, minimizes discomfort, and enhances stability of the lens on the eye. Other axes might not align as effectively with the unique curvature of the patient’s cornea, potentially leading to suboptimal vision or lens displacement, which are important considerations in successful contact lens fitting.