i-adjective
hard to see; indistinct; illegible
Describes something visually difficult to perceive clearly, such as small text, dim lighting, or unclear images.
See also: 見づらい (みづらい)
この字は小さすぎて見えづらい。
This text is too small and hard to read.
霧で遠くの山が見えづらい。
The distant mountains are hard to see because of the fog.
見づらい is a more general 'hard to see' (from 見る + づらい), while 見えづらい emphasizes the state of being visible (from 見える + づらい).
Compound of 見える (mieru, 'to be visible') + づらい (zurai, 'difficult to do'). The suffix づらい attaches to the stem of verbs to express difficulty or hardship in performing the action.