Answers are grounded in this paper and cite their sources.
The effects of rounding of the edge on the focal properties of spherical-depression geodesic lenses are calculated. The focal length for paraxial rays is increased very slightly for slight rounding. For greater rounding, a decrease in focal length results from the increased optical path. Edge-rounding has very little effect on lens aberrations.
No takes yet. Share an insight, caveat, or question.
Van E. Wood (1976) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: