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Biomedical subjects

S Leroux les Jardins

Publications and source records attributed to S Leroux les Jardins.

13 recordsLinked to original sources

[Optical biometry of eyes corrected by phakic intraocular lenses].

PURPOSE: The aim of this study was to determine whether eye length measurements obtained with the IOL Master (Zeiss Humphrey) before and after phakic IOL implantation would show any changes. METHODS: In a prospective study, we used the IOL Master to measure optical biometry in 25 myopic eyes of 15 patients before and after phakic IOL implantation (PRL, ICL, Artisan). The differences between both axial length measurements were calculated and compared using a nonparametric Wilcoxon test. RESULTS: The difference between the preoperative and postoperative measurements ranged from -0.16 mm to 0.06 mm and averaged -0.016 mm, which was not statistically significant (p=0.20). Both measurements correlated in a highly positive manner (r=0.999; p<0.0001). The reproducibility of the preoperative and postoperative axial length measurements was very high (coefficient of variation=0.09% and 0.07%, respectively). The precision was 26 microm for preoperative measurements and 19 microm for postoperative measurements. CONCLUSION: Our results showed that postoperative measurements of axial length are highly comparable to preoperative measurements and that optical biometry can achieve highly precise and reliable axial length measurements in eyes with phakic IOLs. This application becomes clinically relevant in evaluating eyes with phakic IOLs that might require cataract surgery. Hence, accurate axial length measurements in eyes with phakic IOLs will be extremely important when cataract occurs in these eyes and when the preoperative measurements are no longer available.

Adult↗

[Medium-term tolerance of anterior chamber implants in surgical treatment of severe myopia].

PURPOSE: To determine the tolerance of the corneal endothelium and of the haemato-ocular barrier of phakic highly myopic eyes implanted with an anterior chamber I.O.L.ses. METHODS: Twenty-one phakic highly myopic were operated on with a Z.B.A.C.I.O.L. (manufactured by Domilens) by the same surgeon from May 1989 to June 1990. Complete examination including specular microscopy have been performed before surgery and each 6 months and a Laser Flare Cell Meter at 3 years was performed on 14 eyes. RESULTS: Two eyes of the same patient had to be explanted after surgery for important endothelial cell loss. The 19 others had no complication: no cataract, no loss of endothelial cells, no retinal detachment. 14 eyes examined with a Laser Cell Flare Meter had results within normal limits. So, 19 out of 21 eyes implanted for high myopia with Z.B.A.C.I.O.L. have excellent results 4 years after surgery. CONCLUSION: Regarding these results, it seems possible to use this technique again with the new designed Anterior Chamber I.O.L.. Rigorous follow-up of all the implanted eyes is however required.

Adult↗

Results of photorefractive keratectomy on 63 myopic eyes with six months minimum follow-up.

We present our experience with 63 myopic eyes that had photorefractive keratectomy with an excimer laser. Minimum follow-up was six months. Mean preoperative myopia was -3.98 diopters (D) (range: -9.00 D to 1.25 D) and mean preoperative uncorrected visual acuity, 20/220. The epithelium was removed and fixation accomplished with a suction ring. Photoablation was then performed on a 5.0 mm diameter optical zone. Mean postoperative myopia was -0.60 D (range: -6.35 D to +2.25 D) after six months. Mean uncorrected visual acuity was 20/30. All corneas had a subepithelial haze that decreased progressively. There were no major complications. Except in a few cases, predictability was satisfactory. Photorefractive keratectomy proved effective throughout the trial. We need to study more patients with a longer follow-up to determine the indications and applications of this technique.

Adolescent↗

[Current limitations of radial keratotomy].

The so-called R.K. classic technique gives good results for myopias under 5 diopters. We have performed different modifications of the technique for the 8 incisions--optical zone 3 mm R.K. 8 incisions--O.Z. 3 mm. Downhill incision direction or "American technique" incisions (from the O.Z. towards the limbus). 8 incisions--O.Z. 3 mm + a deepening of 20 microns from a 6 mm O.Z. Repeat operations (Stan Franks Backcutting technique or addition of incisions). 8 incisions--O.Z. 3 mm. Uphill incision direction or "Russian technique" (from the limbus towards the optical zone). This study was carried out with 134 R.K. and shows that we get best results for myopias between 5 to 7 diopters, with the last technique (Uphill incision direction).

Adult↗