Squinting as dream image is very rare, but when populating our dreams, it usually stands for a wrong attitude towards life or of a thing or situation you disapprove of in the waking life.
On the other hand, if in your dream you have a turned eye/ crossed eyes, this usually bears a negative significance and may be illustrative of emotional or spiritual 'disorders', very rarely referring to actual physical problems. Therefore, having crossed eyes in a dream is a physical feature which stands as an 'apparel' for the negative aspects of your self or for the negative energy accumulated within your subconscious. Such a dream should be taken as an advice to release repressed feelings, emotions, fears and anxieties gathered up into you soul. Only afterwards will you be able to have an 'accurate view', to see things clearly, achieve an emotional balance and general life equilibrium.