The drag force decreases as the air density decreases.
Conclusion LASIK is scatheless to cornea endothelial cells, and can't bring modality change and density decrease.
The results, as the report from Xu junchao, showed as the age increase the hone mineral density decrease, and in the 50 age group the value of women lower than men.
X-ray manifestations: femoral head and femoral neck bone density decrease in 5 cases.
