ABSTRACT
In 23 (9 males and 14 females) pseudophakic eyes which had a biconvex type intraocular lens (IOL) implanted after cataract extraction, we objectively measured changes in the anterior chamber (AC) depth caused by axial movement of the IOL accompanying accommodation of the contralateral phakic fellow eye, using a Schimpflug slit image with an anterior eye segment image analysis system (Nidek, EAS-1000, Japan). In 114 phakic eyes of 57 persons as controls, AC depths accompanying accommodation from distances of 5 m to 30 cm and 10 cm decreased with increasing age. The decreased mean value of AC depth with accommodation from distances of 5 m to 30 cm was 0.17 mm in patients in their teens, 0.15 mm in patients in their 20 s, 0.10 mm in the 30 s, 0.06 mm in the 40 s, 0.05 mm in the 50 s, and 0.03 mm in the 60 s. The decrease of AC depth with accommodation at a distance of 10 cm was 0 in patients in their 60 s. In the pseudophakic eye changes in anterior chamber depth caused by focusing at short distances were less than 0.04 mm, and decreasing rate of anterior chamber depth (DRAC) was less than 1% in all the pseudophakic eyes. Movement of IOL on the optical axis was too subtle to account for apparent accommodation of the pseudophakic eye.
Subject(s)
Accommodation, Ocular/physiology , Aphakia, Postcataract/physiopathology , Adolescent , Adult , Female , Humans , Lenses, Intraocular , Male , Middle AgedABSTRACT
The authors compared postoperative anterior chamber inflammation of triple procedure; diabetic pars plana vitrectomy, lensectomy with anterior capsule left intact and posterior chamber intraocular lens implantation anterior to anterior capsule, to those of various cataract surgeries with posterior chamber intraocular lens implantation and vitrectomies in diabetic retinopathy eyes. The inflammation was evaluated in terms of the incidence of inflammatory complications (fibrin reaction and posterior synechia of iris), and by periodical measurement of flare counts for postoperative 6 months using a laser flare-cell meter. The inflammation was more intense than those after the following 3 surgeries; phacoemulsification and in the bag intraocular lens implantation after continuous curvilinear capsulorhexis, extracapsular extraction and in the bag intraocular lens implantation after can opener capsulotomy, and vitrectomy alone. The inflammation, however, was less intense compared with that of another method of triple procedure; pars plana vitrectomy, phacoemulsification and in the bag intraocular lens implantation after continuous curvilinear capsulorhexis or can opener capsulotomy, and development of posterior synechia was rarely observed.
