Eág-gemearc

According to the Old English Dictionary:

es;

eág-gemearc

n. Limit fixed by sight :-- Eal ꝥ ús þincð ǽmtig eáhgemearces all that seems to us empty as far as the eye can reach; quo aer gremium diffundit inane, Dóm. L. 148. [Cf. N. E. D. eye-mark.] eag-gemearc