Atonic pupil after cataract surgery.

We report and describe the clinical findings of three patients who developed atonic pupil after uncomplicated extracapsular cataract extraction with posterior chamber intraocular lens implantation. All patients had normally reactive pupils one day postoperatively, but after two weeks, the pupils were dilated and nonreactive to light, accommodation, and miotics. To estimate the incidence of atonic pupil after cataract surgery, we sent a survey on the frequency, clinical features, and possible etiologies of this syndrome to members of the American Society of Cataract and Refractive Surgery.

Spinal cord injury in youth.

To identify special characteristics of the pediatric spinal cord-injured (SCI) population, we analyzed a database of 1,770 traumatic SCI patients; 88 (5%) fell into the two pediatric subgroups: 0-12 years (n = 26) and 13-15 years (n = 62) at time of injury. Differences between age groups were identified with regard to demographics, neurologic characteristics, associated injuries and complications, and management. Mode level of bony injury was C2 in preteens, C4 in teens, and C4-C5 in adults.

Are there acceptable anterior chamber intraocular lenses for clinical use in the 1990s? An analysis of 4104 explanted anterior chamber intraocular lenses.

Purpose: The authors pose the question as to whether there are any anterior chamber intraocular lenses (AC IOLs) acceptable for clinical use in the 1990s.

Methods: Data on the incidence and types of complications of 4104 AC IOLs that were submitted to the Center for IOL Research from 1982 to 1993 were retrieved from the laboratory database and analyzed using cumulative frequency calculations and the chi-square test. Normalized explantation rates were related to implantation rates that were derived from market-share analysis.

Pediatric cataract surgery and intraocular lens implantation techniques: a laboratory study.

The use of primary posterior capsulectomy and anterior vitrectomy during pediatric intraocular lens (IOL) implantation has been advocated as a means of preventing the development of posterior capsule opacification. In this study, we used pediatric eyes obtained postmortem to compare two different sequences in the surgical procedure: (1) anterior capsulectomy, lens substance removal, primary posterior capsulectomy with anterior vitrectomy, and IOL implantation in the capsular bag; (2) anterior capsulectomy, lens removal, IOL implantation in the capsular bag, and primary posterior capsulectomy with anterior vitrectomy. Both sequences could be safely performed in the laboratory setting while maintaining stable capsular fixation of the IOL.

Comparison of mechanized anterior capsulectomy and manual continuous capsulorhexis in pediatric eyes.

Performing a continuous curvilinear capsulorhexis (CCC) can be more difficult in children than in adults because the capsular bag is more elastic. In this study we compared two capsulectomy techniques in pediatric eyes: creating a mechanized circular anterior capsulectomy using a vitrector and creating a conventional smooth-edged curvilinear tear or CCC using a forceps or needle. We used 18 pairs of eyes (36 eyes) obtained postmortem from children ranging in age from four days to 16 years.

Intraocular lenses for pediatric implantation: biomaterials, designs, and sizing.

Posterior chamber intraocular lenses (IOLs) are being implanted in children with increasing frequency. However, with rare exceptions, only IOLs designed for adults are currently available. These lenses may be difficult to insert into small eyes.

[Area of contact of the artificial lens and posterior capsule. Systematic study of various haptic parameters].

New techniques in cataract surgery, namely the small and tunnel incisions, have led to intraocular lens (IOL) designs with haptics angulated anteriorly as low as 0 degrees. Clinical and animal studies strongly support the inhibitory influence of contact between the optic and the posterior capsule on the formation of posterior capsular opacification. Human cadaver eyes were used to examine the effect of different haptic angulations (1 degree, 5 degrees, 10 degrees, 15 degrees), different haptic diameters (11.

Neodymium:YAG laser damage on silicone intraocular lenses. A comparison of lesions on explanted lenses and experimentally produced lesions.

In this study we examined 17 explanted silicone intraocular lenses (IOLs) (two one-piece, 15 three-piece) that had evidence of neodymium:YAG (Nd:YAG) laser damage. The majority of lenses (47.1%) had been explanted because of persistent pigment deposits and chronic inflammation.

Penetrating keratoplasty and intraocular lens exchange: open-loop anterior chamber lenses versus sutured posterior chamber lenses.

Penetrating keratoplasty with intraocular lens (IOL) exchange is generally recommended for eyes with pseudophakic bullous keratopathy, especially when the keratopathy is associated with uveitis, chronic cystoid macular edema, or a uveitis-glaucoma-hyphema syndrome. Review of the literature has shown basically equivalent long-term results of penetrating keratoplasty and IOL exchange using both Kelman-style, flexible, open-loop anterior chamber lenses and acapsular fixation of sutured posterior chamber lenses. The use of suture-fixated posterior chamber IOLs appears warranted in centers where the surgeon has extensive experience with this specific technique and in cases with special indications, for example, in eyes with extensive angle abnormalities.

[Capsulorhexis technique in pediatric cataract. Presented in the rabbit model].

Continuous curvilinear capsulorhexis (CCC) has become a standard procedure in cataract surgery. In pediatric cataracts, however, this technique is difficult to perform. Because of the elasticity and tension of the pediatric anterior lens capsule the danger of radial tears is high.

[Complications after implantation of anterior chamber lenses. An analysis of 4,100 explanted intraocular lenses].

In this study we analyzed the incidence and types of complications seen after cataract surgery and implantation of anterior chamber intraocular lenses (AS-IOLs). This report is based on a review of 4104 explanted AC-IOLs that were submitted to the Center for IOL Research over the past 10 years. The results from pathological examinations were correlated with clinical information.

[Reasons for the explantation of posterior chamber lenses].

In this study we analysed the overall incidence and the types of complications seen after cataract surgery and implantation of posterior chamber intraocular lenses (PC-IOLs) based on a review of 1460 explanted PC-IOLs. Of these explanted PC-IOLs, 1072 (73.4%) were three-piece PMMA IOLs with Prolene haptics, 261 (17.

Capsulorhexis in the rabbit eye as a model for pediatric capsulectomy.

Continuous curvilinear capsulorhexis (CCC) is now a standard procedure in cataract surgery. In pediatric eyes, however, this technique is difficult to perform. Because of the elasticity and tension of the pediatric anterior lens capsule, the danger of radial tears is high.

Comparison of diode and argon laser trabeculoplasty in cadaver eyes.

Purpose: To evaluate differences in the effects of diode and argon trabeculoplasty on cadaver eye trabecular meshwork.

Methods: The argon laser was used at a 50 mu spot size, 500 to 100 mW of power, and a 0.1 second time interval, and the diode laser was used at a 0.

Clinicopathologic study of ocular trauma in eyes with intraocular lenses.

Data on 41 cases (37 intraocular lenses and four globes) of intraocular lenses explanted or expulsed after ocular trauma were retrieved from over 5,000 intraocular lenses and 1,200 globes. The age of the male and female donors varied significantly (male, 64.4 +/- 13.

Anophthalmic socket pain.

We examined and treated four patients with anophthalmic socket pain. Conditions responsible for this problem in this series included scleritis after evisceration, amputation neuroma, pain from a skull-base meningioma, and chemical dependency with drug-seeking behavior. The pain associated with the scleritis after evisceration responded to removal of the scleral remnant.

[Configuration of the capsular sack after implantation of posterior chamber lenses].

The effect of posterior chamber intraocular lenses (PC-IOLs) on the capsular bag was investigated in human cadaver eyes. Short-term changes were observed with different PC-IOLs directly after experimental implantation. Long-term results were obtained from postmortem eyes with PC-IOLs.

Inhibition of posterior capsule opacification: the effect of colchicine in a sustained drug delivery system.

We investigated the effect of colchicine in a sustained drug delivery system on posterior capsule opacification (PCO) in rabbit eyes. A polymer matrix wafer, which diffused colchicine at a steady rate, was implanted in the capsular bag of 34 eyes after the lens material was removed by endocapsular phacoemulsification. Three different drug concentrations were used in the rabbit eyes, which were compared with control eyes containing the polymer matrix wafer without colchicine.

Clinicopathologic study of the effect of radial tears and loop fixation on intraocular lens decentration.

Purpose: The purpose of this study is to determine the effect of loop fixation and anterior capsular tears on intraocular lens (IOL) decentration.

Methods: A retrospective measurement of IOL decentration was performed on 144 human eyes with posterior chamber (PC) IOLs obtained after death.

Results: Decentration in eyes with asymmetrical bag-sulcus fixation (mean +/- standard deviation, 0.

The effect of varying wavelength on subconjunctival scleral laser suture lysis in rabbits.

We studied laser suture lysis of subconjunctival scleral sutures in a rabbit eye using selected wavelengths from a dye and diode laser to determine which wavelength caused the least conjunctival damage. We found an oval shaped area of coagulation necrosis surrounding the suture track in the conjunctival substantia propria measuring in depth 61.0 mu for 488 + 514 nm (blue-green), 105.