A 68-year-old Caucasian man complained of blurry vision while reading and visited the eye clinic for a thorough eye examination. His best-corrected baseline visual acuity with +1.00/+2.25 glasses was 20/20 OD and 20/25 OS at distance and close-up. External testing revealed normal confrontation fields and no afferent pupillary impairment, which were ordinary. A +2.75D enhancement enhanced near vision. The anterior segment evaluation resulted in a normal reading of 15 mm Hg OD and 14 mm Hg OS on the Goldmann applanation tonometer. What could it be?