Due to a local eye problem, including: refractive error, lid (e.g. compression from chalazion), cornea (e.g. keratoconus), lens (cataract), iris/pupil, vitreous, retinal pathology, or disorder affecting occipital lobe
Present with even one eye closed
Physical Exam Findings
Might have impaired acuity
Detailed exam to identify pathologies above (e.g. lid abnormality, cataract, retinal pathology, etc).