Efficacy of 670 nm Light Therapy to Protect against Photoreceptor Cell Death Is Dependent on the Severity of Damage

Figure 4

TUNEL+ cell count in dim-reared animals. Animals raised in dim light (no light damage) treated with 90 J/cm² 670 nm light had three times more TUNEL+ cells compared to control animals that were hand-held only for 30 minutes to mimic treatment conditions ( animals for each group, “”denotes significance ; error bars represent SEM).