A 12 yr old boy presented with right eye vision 6/36 and left eye vision of 6/6 after maximum correction retinoscopy shows fundus and anterior chamber is normal. Right eye =+4.5 D in both axis. Left eye=+1.5 D in both axis. Cause of decreased vision in right eye is

• A. Refractive error
• B. Amblyopia
• C. Optic neuritis
• D. Occipital lobe infarction