偽水晶体眼における偽調節に関する研究

Abstract

Aphakic and pseudophakic eyes have an ability to see from distant to near objects clearly without any refractive corrections. This phenomenon is known as apparent accommodation, or pseudoaccommodation. Apparent accommodation was measured in 43 artificially pseudophakic eyes (33 patients) after posterior chamber IOL implantation. The mean apparent accommodation assessed with a constant dioptric stimulus near-point ruler was 1.69±1.03 diopters. There was a negative correlation between apparent accommodation and pupil diameter, corrected visual acuity in near vision, and a positive correlation between apparent accommodation and cylindrical power, and size of visual target. No significant difference was found in apparent accommodation between measurements done with a near-point ruler and those done with 70 and 80% threshold method of visual acuity test using lens addition. These results show that the amount of apparent accommodation will be strongly affected by the assessment method and examination method. Therefore, we should strive for the proper assessment of apparent accommodation in psudophakic eyes.