● The human eye contains a retina ​ — a membrane with approximately 120 million cells called photoreceptors, which absorb light rays and convert them into electric signals.
● Inimese silmas on võrkkest – membraan, milles on umbes 120 miljonit rakku nimetusega fotoretseptorid. Need neelavad valguskiiri, mida nad muundavad elektrilisteks signaalideks.