PURPOSE To describe a novel excimer laser ablation algorithm, termed optimized prolate ablation (OPA), that uses both topography and ocular aberrometry and maintains or improves the natural corneal shape postoperatively. METHODS A descriptive article outlining the theory behind this OPA algorithm. RESULTS The theoretical changes to the ablation algorithm described in this article will produ...

Simultaneous separation of 37 proteinogenic D/L-amino acids excluding proline with HPLC is generally difficult. In this study, two sets o-phthalaldehyde (OPA)-based fluorescent diastereomers were formed using chiral thiols N-acetyl-L-cysteine (NAC) and N-isobutyryl-L-cysteine (NIBC) independently. It expected that obtained OPA-derivatized D/L show different retention selectivity in reversed pha...