Implantation of an Artisan phakic intraocular lens for the correction of high myopia after penetrating keratoplasty

We report 2 cases in which an Artisan phakic intraocular lens (IOL) (Ophtec) was used to successfully treat high myopia after penetrating keratoplasty (PKP). The first case was a 43-year-old man who had a manifest refraction of -13.75 +3.00 x 50 with a best corrected visual acuity (BCVA) of 20/40(-2) after PKP in the left eye. Approximately 9 months after implantation of the Artisan IOL, the manifest refraction was -2.00 +2.50 x 60 with a BCVA of 20/30(+2). The second case was a 31-year-old man who had a manifest refraction of -10.75 +2.25 x 122 and a BCVA of 20/40 after corneal transplantation in the right eye. Ten months after implantation of the Artisan IOL, the manifest refraction was -2.75 +4.75 x 80 with a BCVA of 20/40. Endothelial cell density did not change significantly in either patient after surgery. The Artisan phakic IOL may provide an alternative method to correct high myopia after PKP.     

Reversal of myopic anisometropic amblyopia with phakic intraocular lens implantation

PURPOSE: To report a case of reversal of myopic anisometropic amblyopia with phakic intraocular lens implantation. METHODS: A 6-year-old boy with anisometropic amblyopia with spherical equivalent refraction of right eye: -14.00 -3.00 x 100 degrees, left eye: -0.50 -3.25 x 90 degrees, was treated for 2 years with occlusion to the left eye, with poor results. Refractive surgery was planned because of contact lens intolerance at age 8 years. A -15.00-D iris claw Artisan intraocular lens (IOL) was implanted. RESULTS: Following surgery, treatment of the amblyopia and spectacle correction of -4.00 D cylinder at 85 degrees in the right eye and -3.50 D cylinder at 90 degrees in the left eye was necessary. Visual acuity 6 months after surgery was 20/25 in the right eye and 20/20 in the left eye, and has remained stable 18 months after surgery. CONCLUSION: Myopic anisometropic amblyopia in an 8-year-old boy was treated successfully with implantation of an Artisan iris claw phakic anterior chamber IOL, combined with occlusion therapy, and resulted in reversal of amblyopia.     

Artisan iris-fixated toric phakic and aphakic intraocular lens implantation for the correction of astigmatic refractive error after radial keratotomy

We report 2 patients who had radial keratotomy (RK) to correct myopia. The first patient developed a postoperative hyperopic shift and cataract. Nine years post RK, she had intracapsular cataract extraction and implantation of an Artisan aphakic intraocular lens (IOL). Twenty years post RK, hyperopia and astigmatism progressed to +7.0 -5.75 x 100 with a best corrected visual acuity (BCVA) of 20/20. Due to contact lens intolerance, the Artisan aphakic IOL was exchanged for an Artisan toric aphakic IOL. Three months later, the BCVA was 20/20 with +1.0 -0.50 x 130. The second patient demonstrated residual myopic astigmatism 6 years after bilateral RK and had become contact-lens intolerant. An Artisan toric phakic IOL was implanted in both eyes. Four months later, the BCVA was 20/25 with a refraction of +0.25 -1.0 x 135 and 20/20 with a refraction of -1.0 x 40. Both patients were satisfied with the visual outcomes.     

Intermittent myopic shift of 4.0 diopters after implantation of an Artisan iris-supported phakic intraocular lens

A 45-year-old man with bilateral high myopia and myopic astigmatism had uneventful implantation of a -10.5 diopters (D) Artisan iris-fixated anterior chamber phakic intraocular lens (PIOL) (Ophtec) in both eyes. In the first days after surgery, uncorrected visual acuity (UCVA) was 20/16 in the right eye and 20/16 in the left; the position of the PIOL was stable. Ten days after surgery, the left eye developed a myopic shift of 4.0 D. Further examination showed that the myopia disappeared when the pupil was medically dilated. After the pupil returned to a natural position, the myopic shift reappeared. Because there were no changes in the subsequent 4 months, we decided to exclavate the IOL, rotate it by 10 degrees, and reenclavate it with less tissue. The myopic shift did not return over the following 20 months, and the UCVA was 20/20. In rare cases, iris-fixated anterior chamber IOLs may induce refractive changes related to effects on the surrounding anatomic structures. This may be corrected by phakic IOL rotation or reenclavation of the phakic IOL with less tissue.     

有晶体眼虹膜扣夹型人工晶体植入术矫正超高度近视

目的探索有晶体眼虹膜扣夹型人工晶体植入术矫正超高度近视的有效性和安全性。方法对27例49眼超高度近视患者行Verisyse有晶体虹膜扣夹型人工晶体植入术,观察手术前后视力、屈光状况、角膜内皮计数、角膜曲率、前房、眼压、人工晶体和晶状体等情况。结果27例49眼人工晶体植入一次成功。术后随访4～8月,17眼（34.7%）视力接近（1行之内）术前最佳矫正视力,31眼（63.3%）视力优于术前最佳矫正视力,比术前最佳矫视力进步1～3行;3眼眼压一过性升高,5眼瞳孔轻度变形,1眼术后1个半月视网膜脱离,1眼术后1月外伤后人工晶体脱位,手术后复位,其余人工晶体位置良好。结论有晶体眼虹膜扣夹型人工晶体植入术矫正超高度近视安全有效,预测性好,远期效果有待进一步观察。     

Refractive lens exchange versus iris-claw Artisan phakic intraocular lens for hyperopia

PURPOSE: To study a paired-match comparison between refractive lens exchange with pseudophakic IOL implant (RLE) and Artisan phakic IOL for high hyperopia. METHODS: Nineteen eyes (12 patients, 20 to 41 years old) with an Artisan phakic IOL (Model 203: 1.00-D increment) for hyperopia from +2.75 to +9.25 D were matched to 19 eyes (15 patients, 26 to 46 yr) with hyperopia from +2.75 to +7.50 D, who had refractive lens exchange (pseudophakic IOL implantation; lenses: 0.50-D increment). Average paired-match difference was 1.13 D and 7.7 years of age. RESULTS: At 1 month after surgery, 84% of refractive lens exchange/pseudophakic IOL eyes and 94% of Artisan phakic IOL eyes had a spherical equivalent refraction within +/- 1.00 D of emmetropia; 58% and 68% of eyes, respectively, were within +/- 0.50 D (P = .97). No eye lost lines of best spectacle-corrected visual acuity (BSCVA) and no significant changes in BSCVA were found in any eye at 1 month after surgery (P = .17). The percentage of eyes with uncorrected visual acuity (UCVA) of 20/40 or better improved from 79% to 89% of eyes at 1 to 2 months after phakic IOL; it remained at 89% to 82% of eyes from 1 to 2 months after refractive lens exchange/ pseudophakic IOL. The coefficient of correlation showed statistically better accuracy (intended vs. achieved refraction; P = .035) for the Artisan phakic IOL (R = 0.83) than for refractive lens exchange/ pseudophakic IOL (R = 0.50). CONCLUSIONS: Spherical equivalent refraction outcome and BSCVA after surgery were similar for both procedures. The Artisan phakic IOL in carefully selected patients provided a better overall outcome for young patients with high hyperopia whose accommodation was preserved, as compared to refractive lens exchange.     

有晶状体眼Verisyse人工晶状体植入术矫正超高度近视眼

目的：探讨有晶状体眼Verisyse人工晶状体植入术矫正超高度近视眼的有效性、安全性及可预测性。 方法：超高度近视眼患者10例13眼植入Verisyse人工晶状体。术后观察患者的视力、屈光度数、眼压、角膜内皮细胞计数、对比敏感度、晶状体位置、眩光敏感度、手术并发症及视觉不良症状。 结果：术后患者裸眼视力及最佳矫正视力均有明显的提高。术后3mo及术后1a患者最佳矫正视力≥0.5者占100%,患者最佳矫正视力≥0.8者占85%。患者术后屈光度稳定,术后1mo～1a,屈光状态变化无明显差异。患者术后1a内各时间点眼压均无明显异常升高。术后角膜内皮计数均有所下降,但其差异无统计学意义。术后3mo时,各频段对比敏感度和眩光敏感度较术前均明显提高。Verisyse人工晶状体与角膜内皮和晶状体均保持了有效的安全距离。术后3mo时,2眼可见Verisyse人工晶状体表面炎性反应物沉积,1眼瞳孔呈轻度椭圆形。患者均无明显不适,满意程度较高。 结论：Verisyse人工晶状体矫正超高度近视眼具有良好的有效性、安全性及可预测性,是补充角膜屈光手术不足的有效眼内屈光手术,但其远期效果有待进一步观察。     

Secondary artisan phakic intraocular lens for correction of progressive high myopia in a pseudophakic child.

An 8-week-old infant underwent unilateral cataract extraction and posterior chamber intraocular lens implantation for total cataract in the left eye. After surgery, a residual progressive myopic error was observed, ranging from -4.5 diopters (D) 6 months after the operation to -14.0 D at the age of 3 years. Because of parental noncompliance for contact lens and spectacles use, secondary implantation of Artisan phakic IOL of -14.0 D power was performed. No intra- or postoperative complications were observed. Nine months after this second operation, myopia diminished to -3.25 D.     

Contrast sensitivity after implantation of toric iris-claw lenses in phakic eyes

PURPOSE: To evaluate the change in contrast sensitivity after implantation of the Verisyse toric phakic intraocular lens (IOL) (AMO) for the correction of myopia with astigmatism. SETTING: Department of Ophthalmology, Johannes Gutenberg-University, Mainz, Germany. METHODS: Eighteen eyes had implantation of an iris-supported toric phakic IOL to correct myopia with astigmatism. The mean preoperative spherical equivalent was -12.65 diopters +/- 3.6 (SD). The contrast sensitivity with best spectacle correction was determined before surgery and 3 months after surgery using the CSV-1000 HGT instrument (Vector Vision Inc.). RESULTS: Three months after IOL implantation, the mean contrast sensitivity had significantly increased from preoperatively at midrange spatial frequencies from 3.2 to 4.4 (6 cycles per degree [cpd]; P = .033) and from 2.4 to 3.7 (12 cpd; P = .032). The differences at spatial frequencies of 3 cpd and 18 cpd were not statistically significant (P = .59 and P = .086, respectively). CONCLUSIONS: Implantation of the Verisyse toric iris-claw lens in phakic eyes to correct high or moderate myopia with astigmatism has the potential to improve contrast vision. The mean contrast sensitivity increased considerably at all spatial frequencies compared with preoperative levels.     

Sequential Intacs and Verisyse phakic intraocular lens for refractive improvement in keratoconic eyes

PURPOSE: To evaluate the safety, efficacy, and stability of sequential Intacs (Addition Technology, Inc.) insertion and Verisyse phakic intraocular lens (pIOL) (AMO) implantation in selected cases of keratoconus. SETTING: Magrabi Eye Hospital, Cairo, Egypt. METHODS: Prospective data were collected from 8 eyes of 6 keratoconus patients with contact lens intolerance, clear corneas, a maximum K-value less than 60.0 diopters (D), and minimum corneal thickness greater than 400 mum. Two 0.45 mm Intacs were inserted through a 1.8 mm radial incision created at 70% of the corneal depth opposite the cone apex. The 2 rings were pushed to meet and embrace the cone apex. Refraction 6 months after Intacs insertion showed residual myopia greater than 6.0 D and residual astigmatism not more than 2.0 D. Thus, a phakic Verisyse IOL was implanted horizontally in the anterior chamber through a 6.5 mm superior clear corneal incision, which was closed with 3, 10-0 nylon sutures after a peripheral iridectomy was created. The uncorrected visual acuity (UCVA), best corrected visual acuity (BCVA), refraction, and topographic profiles were taken 1 week and 1, 3, 6, 9, 12, 18, and 24 months after the second surgery. RESULTS: All eyes achieved UCVA of 20/40 or better. The final spherical error ranged from -1.75 to +1.00 D and the cylindrical error, from 1.25 to 2.50 D. No eye lost lines of preoperative BCVA. These results were relatively stable throughout the follow-up period. CONCLUSIONS: Sequential Intacs and a Verisyse pIOL implantation was safe, stable, and effective in selected cases of keratoconus. It is a reversible surgery that is less invasive than penetrating keratoplasty (PKP). It can avoid or postpone the need for PKP, although it is not an alternative.     

Photorefractive keratectomy or laser in situ keratomileusis for residual refractive error after phakic intraocular lens implantation

PURPOSE: To evaluate the results of combining phakic posterior chamber intraocular lens (IOL) implantation and excimer corneal surgery to treat high myopia or myopia with astigmatism. SETTING: Service d'Ophtalmologie, H?pital Purpan, University of Toulouse, Toulouse, France. METHODS: Thirty-two eyes of 28 patients with extreme myopia or myopia combined with astigmatism were treated by implantation of a phakic posterior chamber IOL. Residual refractive errors were treated no earlier than 6 weeks after IOL implantation by photorefractive keratectomy (PRK) in eyes with low refractive errors or by laser in situ keratomileusis (LASIK) in eyes with higher residual refractive errors. RESULTS: The mean preoperative spherical equivalent (SE) refraction was -18.7 diopters (D). The refractive astigmatism ranged from 0 to 3.5 D. After excimer laser treatment, the SE refraction ranged from -0.5 to -2.5 D and the refractive astigmatism, from 0 to 1.5 D in the PRK group. In the LASIK group, spherical ametropia ranged from -1.5 to +1.5 D and astigmatism, from 0 to 1.0 D. After excimer laser treatment, the uncorrected visual acuity improved in all eyes but a loss of 1 line of the corrected vision after IOL implantation occurred in 22.2% of PRK-treated eyes and in 13.6% of LASIK-treated eyes. CONCLUSIONS: Bioptic treatment of extreme myopia and myopia associated with astigmatism appears to be safer and more predictable than other methods of treatment.     

Postoperative astigmatism and rotational stability after artisan toric phakic intraocular lens implantation

PURPOSE: To evaluate deviations in the axis (intended versus achieved) and postoperative astigmatism after implantation of an Artisan toric phakic intraocular lens (IOL). SETTING: University Eye Hospital, Mainz, Germany. METHODS: This prospective study comprised 29 eyes with high ametropia and astigmatism. All eyes had uneventful implantation of a toric phakic IOL through a superior scleral tunnel incision at 12 o'clock. After a minimum of 6 months, the uncorrected visual acuity (UCVA), best correct visual acuity, refraction, and astigmatism were analyzed in all eyes. A multivariate analysis of postoperative astigmatism was performed. RESULTS: After a follow-up of at least 6 months, 95% of eyes were within +/-1.00 diopter (D) of emmetropia and 85% of eyes has a UCVA of 20/30 or better. The difference between the mean intended cylinder axis and achieved cylinder axis was 3.9 degrees (median 3 degrees; range to 13 degrees). The difference between the mean intended axis and the achieved axis between miosis and mydriasis was 1.8 degrees (median 1.5 degrees; range 0 to 5 degrees). The mean postoperative astigmatism after 6 months was 0.56 D with an axis of 31 degrees. Doubled-angle scatterplot analysis showed a tendency toward more flattening in the vertical meridian. CONCLUSIONS: During the 6-month follow-up, no significant rotation was observed after implantation of Artisan toric phakic IOLs to correct high ametropia. A sutureless sclerocorneal superior approach for phakic IOL insertion resulted in moderate to low astigmatism. Induced astigmatism should be taken into consideration during preoperative planning.     

Implantation of Artisan toric phakic intraocular lenses for the correction of astigmatism and spherical errors in patients with keratoconus

PURPOSE: To evaluate the correction of astigmatism and spherical ametropia in patients with keratoconus through implantation of an Artisan toric phakic intraocular lens (PIOL) (Ophtec, Groningen, The Netherlands). METHODS: Artisan toric PIOLs were implanted uneventfully in both eyes of three patients with keratoconus with clear central corneas and contact lens intolerance. RESULTS: Best spectacle-corrected subjective visual acuity after lens implantation was unchanged in one eye and improved in five eyes. Spherical equivalent refraction was significantly reduced in all eyes (P=.03). The safety index was 1.49. CONCLUSIONS: The implantation of an Artisan toric PIOL may be an alternative for treating astigmatism and myopia in contact lens intolerant patients with keratoconus with clear central corneas. Especially in patients with associated myopia, this procedure is worth considering before planning a penetrating keratoplasty.     

有晶状体眼前房人工晶状体植入术矫正高度近视的临床分析

目的:探讨有晶状体眼Verisyselens(虹膜固定型前房人工晶状体)植入术矫正高度近视的临床疗效及安全性。方法:我院于2004-11始开展了Verisyselens(虹膜固定型人工晶状体)植入术,4例(6眼)高度近视(度数-13.5～22.0D之间),密切观察术后眼压、屈光改变、视力及角膜、虹膜情况,随访1a以上。结果:大部分超过术前最佳矫正视力1～2行,术前裸眼视力0.02～0.2,最佳矫正视力由0.25～0.5,恢复到术后裸眼视力0.5～0.6。并发症较轻、较少,恢复快,仅1例为晶状体偏中心并眩光发生,经再次手术调整晶状体正位后,眩光消失,1眼一过性眼压升高,1眼角膜轻度水肿,1眼虹膜少许脱色素,本组中另3眼出现晶状体表面尘样色素附着,(虹膜未见脱色),但均未影响视力,眼压不高。均未见严重并发症。结论:虹膜固定型前房人工晶状体植入术矫正高度近视,术后视力效果好,屈光度稳定,可预测性强,短期随访,安全性高,但国人为有色人种,术后虹膜持续为晶状体夹持,导致少量而持续脱色素,可能引发严重并发症,尚需注意长期随访。     

Correction of extreme hyperopia: artisan iris-fixated intraocular lens implantation for pseudophakia after clear lens extraction

A 22-year-old patient suffering from both-side extreme hyperopia with amblyopia was corrected with an Artisan iris-fixated intraocular lens (IOL) implantation followed to clear lens extraction (CLE) with posterior chamber (PC)-IOL implantation. The preoperative refraction values were +17.75DS -1.50DC × 168° for the right eye and +17.25DS -0.75DC × 8° for the left eye. The uncorrected visual acuity (UCVA) was 20/200 bilaterally and the spectacle-corrected visual acuity (BSCVA) was 20/50 bilaterally. One year after Artisan iris-fixated IOL implantation, bilateral BSCVA was 20/50 with a refraction of +1.25DS -0.75DC × 13° for the right eye and +1.50DS -1.00DC × 55° for the left eye. The outcomes of an Artisan iris-fixated IOL implantation followed to CLE with PC-IOL implantation were encouraging for the correction of extreme hyperopia. Long term follow-up examinations were necessary for further determination of the efficacy and safety of this combinational procedure.     

5．5mm上方巩膜隧道切口对Artisan人工晶状体植入术后散光的影响

背景在Artisan人工晶状体（IOL）植入矫正高度近视眼的手术中采用5．5ITIm上方巩膜隧道切口导致的术后散光是影响手术效果的主要原因。目的评价5．5mm上方巩膜隧道切口对有ArtisanIOL植入术后角膜散光的影响。方法对2004年10月-2008年10月在广东省人民医院眼科接受虹膜固定型IOL（PIOL）植人术矫治高度近视的患者111例202眼进行回顾性病例观察研究,随访期为12个月。观察比较患者术前,术后1、3、6、12个月术眼的裸眼视力、最佳矫正视力、球镜度、柱镜度、散光轴等指标,按照术前患者散光轴向分为顺规组与逆规组。应用Holladay十步向量分析法计算手术源性散光量。结果术后1年复诊,94．1％（190眼）患者术后裸眼视力达到或高于0．5,85．1％（172眼）达到或超过术前最佳矫正视力。术眼术后1、3、6、12个月的平均柱镜度数均较术前减少,差异均有统计学意义（t=-4．30,P=0．00;t=-2．27,P：0．01;t=-2．04,P=0．04;t=-2．79,P=0．01）。术后1、3、6、12个月手术源性散光分别为＋1．94D、＋2．26D、＋2．29D、＋2．25D,轴向分别为171。、170。、181。、175。。顺规组术后各时间点术源性散光分别为（＋1．97±1．84）D、（＋2．25±1．75）D、（＋2．27±1．76）D、（＋2．24＋1．75）D;逆规组术后各时间点术源性散光分别为（＋1．75±1．88）D、（＋2．35±1．74）D、（＋2．38±1．76）D、（＋2．34±1．74）D,术后各时间点两组间术源性散光值比较差异均无统计学意义（t=0．54、-0．29、-0．27、-0．29,P=0．59、0．78、0．79、0．78）。结论ArtisanIOL矫正高度近视是有效的,术中采用上方5．5mm巩膜隧道切口时,术后1年可在眼球175°子午线方向产生＋2．25D的手术源性散光。     

高度近视Zyoptix-LASIK和Artisan有晶状体眼人工晶状体植入术对视觉质量的影响

目的探讨高度近视Zyoptix-LASIK和有晶状体眼Artisan人工晶状体（IOL）植入术后高阶像差和对比敏感度的差异。方法按照术眼中央角膜厚度是否能够满足准分子激光角膜原位磨镶术（LASIK）的条件,将术眼分为LASIK组和ArtisanIOL组。LASIK组15例30眼接受波前像差引导的个体化LASIK,平均年龄27.6岁,屈光度-7.0～-12.0D平均等效球镜（-9.16±1.15）D;ArtisanIOL组17例30眼接受虹膜固定性有晶状体眼ArtisanIOL植入术,平均年龄29.1岁,屈光度-8.0～-14.0D平均等效球镜（-11.51±1.62）D。对比2组术后视力、最佳矫正视力、瞳孔大小、屈光状态、高阶像差、明光、暗光、暗光眩光条件下的对比敏感度等指标。高阶像差值以均方根（RMS）表示,测量总高阶像差（RMSh）、3阶X轴彗差（RMS3x）、3阶Y轴彗差（RMS3y）、4阶球差（RMS4s）及4阶像差（RMS4g）。结果术前2组间年龄和高阶像差的差异均无统计学意义（P〉0.05）。术后ArtisanIOL组的高阶像差低于LASIK组,其中2组间RMSh、RMS3x和RMS4g的差异均有统计学意义（P〈0.05）。术后2组高阶像差与术前相比均增高,但ArtisanIOL组手术前后RMS3x的差异无统计学意义（P=0.793）。ArtisanIOL组在明光、暗光、暗光眩光条件下各空间频率的对比敏感度均高于LASIK组,暗光条件下3、6、12cpd空间频率间的差异有统计学意义（P〈0.05）。结论与个体化LASIK相比,高度近视有晶状体眼植入ArtisanIOL后高阶像差的增加较少,且其暗光下中高空间频率对比敏感度优于LASIK。     

A randomized paired eye comparison of two techniques for treating moderately high myopia: LASIK and artisan phakic lens

OBJECTIVE: To compare refractive performance and safety of laser in situ keratomileusis (LASIK) and Artisan phakic intraocular lens (PIOL) for moderately high myopia. DESIGN: A prospective, randomized trial with paired eye control. PARTICIPANTS: Twenty-five patients with myopia ranging from -8.00 to -12.00 diopters (D). INTERVENTION: For each patient, one eye received LASIK and the other one was implanted with an Artisan phakic intraocular lens. The treated eye and the surgical technique were randomized. MAIN OUTCOME MEASURES: Primary outcome measure was spherical equivalent refraction. Main secondary outcome measures were the change of two or more lines and safety index (ratio postoperative to preoperative best-corrected visual acuity). RESULTS: One year after surgery, the mean spherical equivalent refraction was -0.74 +/- 0.67 D for LASIK-treated eyes and -0.95 +/- 0.45 D for Artisan-treated eyes, and the majority of LASIK-treated eyes (64%) and Artisan-treated eyes (60%) were within +/-1.00 D of the intended result. At 1 month, the mean spherical equivalent refraction was -0.28 +/- 0.71 D for LASIK and -1.07 +/- 0.59 D for Artisan (P < 0.01). The changes of two or more lines were in favor of Artisan (P < 0.05). The safety index was significantly better for Artisan (1.12 +/- 0.21) than for LASIK (0.99 +/- 0.17) at 1 year (P < 0.02). CONCLUSIONS: In cases of moderately high myopia, LASIK and Artisan phakic intraocular lenses seemed to produce a similar predictability. The best-corrected visual acuity and subjective evaluation of quality of vision were better for Artisan.     

A retrospective analysis of the first Indian experience on Artisan phakic intraocular lens

PURPOSE: To evaluate the efficacy, safety, predictability and stability of implanting a polymethylmethacrylate phakic intraocular lens (PIOL) in high myopia. MATERIALS AND METHODS: A retrospective analysis of the data of patients who underwent Artisan phakic IOL implantation between 2002 and 2003 with a follow-up of at least 24 months. RESULTS: An Artisan myopia lens was implanted in 60 eyes of 36 patients with preoperative myopia ranging from -5.0 to -24.0 D. Mean patient age was 22.6 years. Mean spherical equivalent of manifest refraction stabilized by the first postoperative week. At three months follow-up, 54 eyes (90%) had a postoperative refraction within +/- 1D emmetropia and 45 eyes (75%) had uncorrected visual acuity of 20/40 or better. Seven eyes (11.6%) had loss of one Snellen line and none had loss of two Snellen lines or more at three months. The mean endothelial cell loss was 3.8% at three months, 5.2% at six months, 5.25% at 12 months and 6.38% at two years, which was not significant. Postoperative complications included anterior chamber reaction in two eyes (3.3%), rise in intraocular pressure in six eyes (10%) and dislocation of PIOL in two eyes (3.3%). CONCLUSION: Implantation of Artisan myopia lens to correct high myopia resulted in a stable and fairly predictable refractive outcome with few complications. Significant endothelial damage was not detected in two years of follow-up.     

Laser in situ keratomileusis and photorefractive keratectomy for residual refractive error after phakic intraocular lens implantation

PURPOSE: To determine the visual and refractive outcome of photorefractive keratectomy (PRK) and laser in situ keratomileusis (LASIK) in eyes with prior posterior chamber phakic intraocular lens implantation for high myopia. METHODS: We studied a series of 37 consecutive eyes of 31 patients who underwent LASIK or PRK for residual refractive error following collamer posterior chamber intraocular lens (IOL) (Staar Surgical Implantable Contact Lens) implantation into a phakic eye. Twenty-eight eyes had LASIK and nine eyes had PRK. Mean follow-up was 8.1 +/- 4.7 months after laser ablation (range, 3 to 18 mo). RESULTS: The preoperative mean spherical equivalent refraction prior to phakic posterior chamber IOL implantation was -17.74 +/- 4.89 D (range, -9.75 to -28.00 D). Following phakic IOL implantation and prior to LASIK or PRK, mean spherical equivalent refraction was -2.56 +/- 2.34 D (range, -0.25 to -8.75 D). One month following LASIK or PRK, mean spherical equivalent refraction was -0.24 +/- 0.52 D (range, -1.50 to +1.50 D), 3 months following LASIK or PRK, mean spherical equivalent refraction was -0.19 +/- 0.50 D (range, -1.50 to +1.00 D). The refraction was within +/-1.00 D of emmetropia in 36 eyes (97.2%) and within +/-0.50 D in 31 eyes (83.7%). Three eyes developed anterior subcapsular opacities several weeks after laser ablation, one eye developed macular hemorrhage 4 weeks after laser ablation, and one eye had corticosteroid induced ocular hypertension. CONCLUSIONS: LASIK or PRK can be used to treat the residual refractive error following posterior chamber phakic IOL implantation.