Ophthalmology Which clinical feature of differentiates orbital apex syndrome (OAS) from superior orbital fissure syndrome (SOFS)? A Proptosis B Horner's syndrome C Loss of vision D Loss of ocular movements 💡 Explanation Which clinical feature of differentiates orbital apex syndrome (OAS) from superior orbital fissure syndrome (SOFS)? ✓ Correct Answer: C. Loss of vision