What might a patient fitted with a -6.00 rigid diagnostic lens experience?

A patient fitted with a -6.00 rigid diagnostic lens may experience more awareness of the lens edge due to the combination of the lens design and the individual's visual acuity needs. Rigid gas permeable lenses, particularly those with a higher minus power like -6.00, create a specific interaction with the cornea and the tear film, which can lead to a noticeable lens edge.

Patients with higher refractive errors often report increased awareness of the lens because the curvature of the lens and the thickness can affect how the lens sits on the eye. As the power of the lens increases, the edge may become more prominent relative to the cornea, leading to a heightened sensitivity to the lens' presence throughout the day.

Additionally, the design parameters of rigid lenses, such as edge shape and thickness, contribute to this awareness. This can be particularly true if the lens does not have a well-fitted edge profile tailored to the individual's eye shape and movement. Overall, this consideration of lens design and patient experience with high minus lenses supports the reasoning behind the selected answer.