Thank you for reaching out to the Samsung community! Our development team will review it and if feasible we'll try to implement. Keep Posting! Eye unlock/Iris unlock requires Iris scanner which is a hardware part and cannot be provided by any software update.
Be sure to hit ♡ when you find an answer that works for you. For Further assistance, you can get in touch with us via Live Chat option by following- http://livechat.support.samsung.com/Customer_new/IN. You can also connect us via Samsung Members web community by following mentioned url-https://community.samsungmembers.com/en_IN#/
