Wang H, Zhang Y, Guan J
Department of Ophthalmology, First Affiliated Hospital, China Medical University, Shenyang.
Zhonghua Yan Ke Za Zhi. 1996 Jul;32(4):291-4.
To study the question about apparent accommodation in pseudophakic eyes after implantation of posterior chamber intraocular lens (IOL).
The distant and near vision, refraction, pupillary size and shape, the depth of anterior chamber before and after mydriasis of 68 patients (73 eyes) with rigid posterior chamber IOL implantation were examined when the correcting lenses were worn, their powers of apparent accommodation were measured by HS-9D Accommod-Polyrecorder.
The mean value of apparent accommodation was 1.53 +/- 0.59D. There was a negative correlation between apparent accommodation of pupillary diameter (r = -0.62). The apparent accommodation in the group with normal pupillary movement is greater than that in the group with abnormal one. A mean change of anterior chamber depth, 0.4 mm, before and after mydriasis was found. It appears that rigid posterior chamber implants do move backward on ciliary muscle relaxation. There was a positive correlation between apparent accommodation and the degree of IOL movement (r = 0.47). No significant correlation was found between apparent accommodation and the anterior chamber depth before mydriasis and age (r = 0.26, r = 0.22), etc.
The apparent accommodation is the result of the change of focus depth in the eye which is caused by the cooperation of several factors such as corneal astigmatism, pupillary size and movement, etc. So optimal postoperative myopic astigmatism and good pupillary movement are beneficial to apparent accommodation in an eye with posterior chamber IOL implantation.
