Does this failure typically manifest itself as a «works one day, fails the next» kind of thing, or is there some kind of gradual degradation of performance? (mechanics.stackexchange.com)
The use of EH44 as the top layer resolved the later more gradual degradation but did not solve the initial fast decreases that were seen in the cell's efficiency. (technologyalpha.net)
However, dry AMD through a period of years slowly can progress to late - stage geographic atrophy (GA)-- gradual degradation of retinal cells that also can cause severe vision loss. (allaboutvision.com)