The Apollo 17 crew repeated an experiment, also conducted on Apollo 16, with the objective of linking these light flashes with cosmic rays. Evans wore a device over his eyes that recorded the time, strength, and path of high-energy atomic particles that penetrated the device, while the other two wore blindfolds to keep out light. Investigators concluded that the available evidence supports the hypothesis that these flashes occur when charged particles travel through the retina in the eye.
the APOllO 17 CrEW repeated aN experimenT aLso ConDUcted on apOllO 16 WiTh the objeCtive of linKiNG these light flashES wiTh cOsMiC rAys evans WoRe a deVice OVer his eYeS ThaT recorded thE tiME strengTH and path of high-eNergy AtOmic Particles thAt Penetrated the devicE WHiLe tHe otHer two woRe bLindfoldS To kEeP out lIghT InvestigatorS cOncLudeD thAt ThE AVAiLable eVidEnCE supPorTs the hyPotheSIS ThAt thesE FlASHEs OccUr WhEn cHargEd pARtiCles TRavel tHRougH The retIna in The eye