Bright lights increase trigeminal reflex blink amplitude and the rate of spontaneous blinking in rodents. Light can modify trigeminal activity without involving the central visual system.

The 1995 United States Public Health Service (USPHS) recommendation regarding HIV testing for pregnant women was revised in 2003 calling for routine HIV testing for pregnant women with patient notification. Routine testing (opt-out screening) offers women the opportunity to decline HIV testing but eliminates the requirement of pretest counseling and separate written consent. To assess women's opinions about the opt-out approach to HIV testing during pregnancy, a cross-sectional survey was conducted in May-June 2004 at 14 geographically diverse clinics funded by Ryan White CARE Act (RWCA) Part C and Part D agreements. Of 853 women respondents to the one-page, self-completed survey questionnaire, 90% agreed with routine HIV testing and 91% reported being comfortable with testing, demonstrating that the large majority of women agree with and support HIV testing as a part of routine prenatal care. Women's opinions were associated with HIV testing status, e.g., 76% of women who had never been tested for HIV thought HIV testing should be part of a routine pregnancy check-up as compared with women who were HIV-negative (93%) or HIV-positive (90%) (chi(2) = 31.3943, p < 0.0001). Comfort with HIV testing was associated with higher HIV knowledge. Approximately half of the respondents indicated that HIV tests are different from other tests and that women need more information prior to testing. Results demonstrated clear consensus in support of routine testing. Increased efforts to disseminate resources to providers coupled with providers' effective communication of information to pregnant women can build on the support that women have conveyed for HIV testing during pregnancy.