The ISS has been leaking air for 5 years, and engineers still don’t know why
The ISS is aging. Zvezda and the PrK launched in July 2000 and will mark a quarter-century in orbit next year. NASA wants to ...
Mid Day16 天
The Latest Advances in LASIK and Other Vision Correction Procedures
This procedure involves reshaping the cornea, the eye’s clear front surface, to improve how light focuses on the retina.
Baylor College of Medicine3 年
Laser procedures including LASIK and PRK
Compared to standard LASIK and PRK, CustomVue LASIK offers the potential for improved quality of vision ... a mechanical microkeratome uses an oscillating metal blade to cut the corneal flap prior to ...