Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Resonance Raman measurement of macular carotenoid levels in normal eyes at 1525 cm−1. Two hundred twenty eyes from 138 normal subjects were measured by the ocular resonance Raman instrument using the protocol described in Methods. The best-fit curve is an exponential fit with R = 0.664. Open circles are phakic eyes, and filled circles are pseudophakic eyes. The mean ± standard deviation (SD) for the best three of five readings is shown.
