I had ground to a halt at the end of the second pitch of a new line in Pembroke. I was only about 30ft from the top but couldn't quite find a way through. Finally decided to belay on the slight ledge I was on, it was a bit marginal - rps and small wires behind the one flake. Pete seconded the pitch and looked at the ground above and the state of the belay and declared he was down climbing 20ft to the last good runner (6a ground so not trivial) and we would abb off that. As he set off down he knocked my glasses off. I've not got great eye sight -7.5 in both eyes so when it was my turn to reverse Pete had to guide my feet to the holds, whilst I was facing a decent factor 2 fall onto the belay. Managed that and set up the ropes for the abb. Pete assured me it was all fine so sent me down first. Obv the ropes went straight into the sea so I had to swim in to a ledge, when Pete got down I had to pull him into the ledge so he stayed nice and dry. Rest of weekend I was forced to just second routes as I had no spares with me. [1]
References
[1] https://ukbouldering.com/threads/glasses-string.34794/#post-717870