An ellipse has 2 foci. They are the points of the major axis which are at distance $a$ from the intersection between the minor axis and the ellipse. The distance between the foci and the center is then called the linear eccentricity $f$.
Find Your Surgeon. Find Your Surgeon. The average cost of laser skin resurfacing is $2,222 for ablative and $1,113 for non-ablative, according to ASPS 2012 statistics. The cost of laser skin resurfacing may vary, and the aforementioned fees are the national average surgeon/physician fee only.ind Your Surgeon. The average cost of laser skin resurfacing is $2,222 for ablative and $1,113 for non-ablative, according to ASPS 2012 statistics.
Microdermabrasion costs may range from $100-$250, the average cost being around $100 per session. Costs have decreased considerably over the last 5-10 years as these units have become more readily available.icrodermabrasion is quite affordable and much less expensive than other skin resurfacing treatments such as dermabrasion or laser peels which may cost around $2,500. Home microdermabrasion with a consumable-free system like Vacubrasion may cost less than $1 per session.