Light travels in straight lines. We can see whatever is in our line of sight. If the earth is flat and there is nothing between us and the ice wall we should be able to see it from great distances
Discussion
Ridiculous claim - the air at sea level is the least "transparent". Some day you can see a mountain 100 kms away, some day you cannot. The notion we would be able to see forever is either a lazy or bad faith argument. It is observably false.