Complications and visual outcome 4 months after extracapsular cataract extraction with implantation of posterior chamber lenses

Consecutive registration, rapid retrieval and relevant analysis of information about cataract patients were obtained by applying a data form. The form was designed to be used with a statistical computer program (SPSS/PC). Data describing cataract cases, operations and postoperative controls were recorded. The information is contained in 76 variables, each with up to 10 alternative answers. The main advantages are the opportunity for quality control and clinical research. As an example, an analysis of the pre- and postoperative visual acuity is presented. Originally, the material consisted of 969 eyes, and of these, 948 eyes were available for follow-up. The postoperative corrected visual acuity was 5/5 or better in 57.2% of the eyes. In 80.4% of the eyes a visual acuity better than 5/10 was achieved. The main cause of postoperative visual acuity less than 5/8.5 was age-related macular degeneration (115 eyes). This maculopathy was recognized preoperatively in 76 eyes.

Section: Discussionsupporting

confidence: 94%

Cataract surgery Computer‐based registration and analysis of data

Drolsum

Davanger

Haaskjold

1993

“…Only decentration of the lens optic exceeding approximately 0.5 mm and rotation of the lens in excess of approximately 10" were registered. Clinically significant cystoid macular oedema (CME) signified a biomicroscopically visible CME combined with a fall in visual acuity of at least 0.2 to a level below 0.5 (Naeser et al 1986b).…”

Section: Methodsmentioning

confidence: 99%

Morphological changes and lens position 2½ years after intracapsular cataract extraction with implantation of a semiflexible anterior chamber lens

Næser

Hansen

Nissen

1987

Self Cite

Morphological changes and lens position were examined in 51 patients 25 to 38 (mean 30) months after intracapsular cataract extraction (ICCE) with implantation of the semiflexible, 3M, style 70, anterior chamber lens. Morphological changes presumably associated with the ICCE proper were: iris transillumination defects (68.6%), rupture of anterior hyaloid membrane (20%), detachment of posterior vitreous (42.9%) and anterior synecchiae (13.7%). The implant-related morphological changes were caused by iris tucking (19.6%), small, mobile lenses causing endothelial disturbance (9.8%), iris-haptic adhesions and progressive ovalling of pupillary form. The present morphological changes were compared with a previously published examination of the same patients performed 4 months after surgery: 9 eyes without tissue changes around the lens feet at the previous follow-up now had iris-haptic adhesions involving from 1 to 4 lens feet. In 8 eyes the iris-haptic adhesions had progressed. Compared with the previous examination the fraction of eyes with tissue changes at the lens feet had risen from 47.1 to 64.7%, while the number of eyes with oval pupils had increased from 54.9 to 80.4%. Contact between lens haptic and iris root seems to constitute a constant stimulus for structural changes of the iris.

“…Articles with a similar scope can be found in the recent ophthalmic literature (Hillman & de Dombal 1981;Hoffer 1981;Thijssen & Deutman 1981;Hauff 1983;Lepper & Trier 1983;Hillman 1983Hillman , 1985Naeser et al 1986), but results and conclusions may appear inconsistent. Possibly this reflects differences regarding ultrasound equipment, data handling, IOL type, and type of surgery.…”

mentioning

confidence: 90%

Intraocular lens calculation

Fledelius¹,

Alsbirk²,

Goldschmidt³

1987

Intraocular lens power prediction and final astigmatism were evaluated in 100 consecutive cataract patients (age 57-92 years, mainly with intracapsular extraction) 4-13 months after insertion of a 3M type 78 anterior chamber lens. The analysis was based on refractive recordings from the referring ophthalmologists who took care of post-operative controls. Ninety-two patients were accepted for the study. A Sonometrics DBR 400 ultrasound equipment and a Haag-Streit keratometer had been used for measuring eye length and corneal power, the Binkhorst programme and SRK formula for selecting IOL power, resulting in an IOL range of +12 to +23 D. Mainly, low myopia was intended. Nearly 50% fell within 0.5 D from predicted value; 90% were within +/- 1.5 D, by both calculating methods. SRK predictions appeared unaffected by eye size, while axial length (x) significantly influenced Binkhorst prediction (y): y = 8.08-0.35x (r = -0.40), the deviation being most marked in very short eyes. For eyes of midsize the two methods did not differ. Regarding astigmatism, 3 patients ended with values above 3D. In 83% it was less than 2D. Eighty per cent obtained a visual acuity of 0.5 or better. All things considered we feel that the calculation procedure should be standard when performing cataract surgery with IOL implantation.