水口 忠

PURPOSE: To investigate the efficacy of modified internal limiting membrane (ILM) flap technique combined with vitreous surgery for treating macular holes and examine the outcomes in visual function and anatomic macular hole closure. STUDY DESIGN: Retrospective, observational. METHODS: Between July 1, 2015, and October 1, 2019, the modified inverted ILM flap technique combined with vitreous surgery was used to treat idiopathic macular holes, postoperative progression was then followed for at least 6 months in 96 participants (98 eyes). We modified the method by removing the lower half of the ILM while peeling and inverting the upper half. The mean age of the participants was 65.9 ± 11.9 years (41 men (42.7%) and 55 women (57.3%)). Retrospective evaluations of macular hole diameter, corrected visual acuity, and macular hole closure rates were performed using data from medical records. RESULTS: The mean macular hole diameter was 623.6 ± 207.4 μm. The mean corrected visual acuity (logMAR) was 0.79 ± 0.27 before surgery and 0.46 ± 0.35 at 1, 0.35 ± 0.39 at 3, and 0.31 ± 0.36 at 6 months Post surgery, showing significant differences before and after surgery (p = 2.30 × 10- 2). The macular hole closure rate was 98%. CONCLUSION: The modified inverted ILM flap technique combined with vitreous surgery was an effective method for treating macular holes, resulting in improvement in closure and visual acuity.

OBJECTIVES: The purpose of this study was to examine the incidence of, and risk factors for, epiretinal membrane (ERM) surgery after an initial pars plana vitrectomy (PPV) for rhegmatogenous retinal detachment (RRD). METHODS: The records of consecutive patients (3,495 eyes of 3,387 patients) who underwent RRD repair at Fujita Health University Hospital between January 1, 2008, and February 28, 2019, were retrospectively reviewed. A total of 1,736 eyes without an ERM in preoperative optical coherence tomography were included in this study. RESULTS: The incidence of ERM surgery after RRD repair was 2.4%. The mean time from RRD repair to ERM surgery was 19.5±27.2 months. The odds ratios after adjusting for age and sex were as follows: the preoperative visual acuity (logarithm of the minimum angle of resolution, logMAR), 2.17 (p=0.02; 95% confidence interval [CI], 1.11-5.16); axial length, 1.38 (p=0.002; 95% CI, 1.12-1.72); 20-gauge vitreous surgery instruments, 3.82 (p<0.0001; 95% CI, 2.02-7.16); internal limiting membrane (ILM) peeling, 0.28 (p=0.033; 95% CI, 0.05-0.92). ERM surgery improved visual acuity from 0.36 to 0.01 logMAR, even at ≥1.5 years after RRD repair. CONCLUSIONS: Careful follow-up is required in the following cases: long axial length before RRD repair, low visual acuity, use of 20-gauge vitreous surgery instruments, and a lack of ILM peeling.

<sec><title>Introduction</title> The ability to reduce illumination levels is generally accepted as one of the main benefits of a three-dimensional heads-up system (3D system: Ngenuity®; Alcon, CA, USA). Some studies have focused on illumination reduction in vitreoretinal procedures; however, information regarding illumination reduction in cataract surgery has not been published. </sec><sec><title>Purpose</title> This study aimed to compare the illumination of the operational field with a 3D system and a standard microscope eyepiece during cataract surgery. </sec><sec><title>Subject and methods</title> We retrospectively evaluated 91 eyes of 84 consecutive patients who were undergoing cataract surgery at our hospital. We used the 3D system and the eyepiece on alternative days. We determined the minimum light intensity required for safe surgery using the foot switch of the microscope (OMS800; Topcon, Tokyo, Japan). Illuminance on the ocular surface and the minimum illuminance required for the operation were calculated from the minimum light intensity. </sec><sec><title>Results</title> The 3D system was used in 45 eyes (3D group), and the eyepiece was used in 46 eyes (eyepiece group). The values of minimum illuminance in the 3D group were significantly lower than those in the eyepiece group (3D: 5500 ± 2000 lux, eyepiece: 11,900 ± 1800 lux; p &lt; 0.001*). In addition, the illuminance of the operational field was reduced by 60.4% on average using the 3D system. </sec><sec><title>Conclusion</title> With real-time digital processing and automated brightness control, the 3D system reduced ocular surface illumination by 50% or more. Hence, the 3D system may contribute to reducing the risk of retinal phototoxicity and patient photophobia. </sec>

OBJECTIVES: We compared the effects of sub-Tenon's capsule anesthesia (STA) and trans-Tenon's capsule retrobulbar anesthesia (TTRBA) in 68 patients with epiretinal membrane. METHODS: Either STA or TTRBA was induced with 3 mL of lidocaine (2%) before vitrectomy combined with phacoemulsification and aspiration (phacovitrectomy). Akinesia was evaluated by range of eye movement (ROEM) in upward, downward, nasal, and temporal directions at 4, 10, and 30 minutes after injection. Analgesia was evaluated with a visual analogue pain score, which ranged from 0 to 10. RESULTS: The mean cumulative ROEMs were 1.44±1.02 corneal diameters (CDs) at 4 minutes, 0.55±0.76 CDs at 10 minutes, and 0.26±0.33 CDs at 30 minutes in patients who received STA; these values were 0.39±0.35 CDs at 4 minutes, 0.22±0.30 CDs at 10 minutes, and 0.13±0.29 CDs at 30 minutes in patients who received TTRBA. At both 4 and 10 minutes, the cumulative ROEMs in all directions, as well as the temporal ROEMs, were significantly larger in patients who received STA than in patients who received TTRBA. Pain scores did not significantly differ between groups at any time point. CONCLUSIONS: STA and TTRBA produced identical degrees of analgesia, but akinesia was slower in patients who received STA. TTRBA might be preferable for patients undergoing brief vitrectomy.

OBJECTIVES: The aim of this study was to determine whether age correlates with amplitude and latency, when full-field electroretinography (ERG) is performed using skin electrodes. The ability of pulse reference power line noise reduction (PURE) to dampen the noise associated with the use of skin electrodes, was also investigated. METHODS: ERG was performed on 77 eyes in 77 healthy subjects (mean age: 55.6±19.0 years; age range: 9 to 86 years). Subjects with -5D or higher myopia, Emery-Little grade III or higher cataracts, retinal disease, uveitis, glaucoma, ≤5 mm mydriasis, or a history of intraocular surgery other than cataract surgery, were excluded. The active, reference, and ground electrodes were placed on the lower eyelid, outer canthus, and earlobe, respectively. Responses were averaged 10 times for dark-adapted (DA) ERGs, and 32 to 64 times for light-adapted (LA) ERGs. Noise was removed using the PURE method. RESULTS: The DA ERGs without PURE were so noisy that the amplitude or latency could not be determined, whereas those with PURE were comparatively quieter. ERG with PURE demonstrated a significant negative correlation between age and amplitude and a significant positive correlation between age and latency. CONCLUSIONS: We could record the measurable ERG waveforms with skin electrodes by using the PURE method, especially in fewer averaged conditions. It is suggested that skin electrode with PURE is suitable to examine the pathological ERGs, and other types of electrodes. It is recommended that the aging effect should be taken into consideration when pathological ERGs are evaluated.

<sec><title>Purpose:</title> We report a novel technique for visualizing the posterior surface of the lens nucleus during phacoemulsification. </sec><sec><title>Surgical Technique:</title> Hydro-dissection was performed using a solution of 20 mg triamcinolone acetonide powder without preservatives mixed with 3 ml BSS-plus, and triamcinolone acetonide was clearly identifiable underneath the posterior surface of the lens nucleus. Using a phaco-tip, the nucleus was shaved to the level of the triamcinolone acetonide and could be easily divided. The remnant triamcinolone acetonide was aspirated as much as possible from the lens cortex with an infusion/aspiration tip. </sec><sec><title>Subjects and Evaluation Technique:</title> Twenty-eight eyes in 28 patients with cataracts were enrolled in this study. Triamcinolone acetonide-assisted phacoemulsification was performed in 13 eyes in 13 patients (triamcinolone acetonide-phacoemulsification group), and normal phacoemulsification was performed in 15 eyes in 15 patients (phacoemulsification group). Intraocular pressure was measured in all patients pre-operatively, 1 day after, and 1 week after surgery. Corneal endothelial cell density was measured pre-operatively and 1 month after surgery. The time of surgical phacoemulsification (surgical phaco time) was measured from the video of the surgery. </sec><sec><title>Results:</title> Surgery was successively performed in all eyes. Pre-operative and post-operative intraocular pressures and cell densities did not significantly differ between the two groups. Surgical phaco time was shorter in the triamcinolone acetonide-phacoemulsification group than in the phacoemulsification group (157.1 ± 51.7 s vs 225.3 ± 45.1 s; p = 0.006). </sec><sec><title>Conclusion:</title> The triamcinolone acetonide-assisted phacoemulsification procedure is safe and useful for visualizing the posterior surface of the lens nucleus and facilitates removal of the lens nucleus by phacoemulsification. </sec>

目的:新しく開発したアークスキャン式広画角超音波診断装置を用いて、健常眼の眼軸と赤道部径を計測して眼球の形状を検討した。対象および方法:対象は正常眼41眼。B-mode画像より、眼軸長axial length(AL)、赤道部水平径horizontal diameter(HD)、赤道部垂直径vertical diameter(VD)を定量した。結果:全体でALとHD、VDは正の相関を認めた。長眼軸群と非長眼軸群に分けて検討すると長眼軸群でAL、VD、HDが有意に大きかった。赤道部径/眼軸長は非長眼軸群が有意に大きかった。角膜屈折力平均値とHD、VDは負の相関を認めた。結論:広画角超音波診断装置は眼球赤道部径を測定することができ、眼軸延長に伴う眼球形態の変化を3次元的にとらえることができた。この装置は眼球形態を測定するデバイスとして臨床上有用と考えられた。(著者抄録)

＜文献概要＞目的:網膜剥離を合併した朝顔症候群の治療法は確立していない。筆者らは,片眼性または両眼性の本症3例4眼の病状と治療経過,転帰について今後の治療法選択の一助となるよう報告する。症例:症例1は14歳の女児(片眼性),症例2は43歳の女性(片眼性),症例3は20歳の男性(両眼性)で,症例3の左眼は前医で治療された後に眼球癆となった。所見:症例1の矯正視力は,右1.0,左0.01で,左眼に朝顔症候群と黄斑を含まない乳頭周囲に限局した網膜剥離を認めた。網膜裂孔は同定されなかったため,経過観察を行い,初診から5年後に網膜は自然復位した。最終受診時視力は眼前30cm手動弁だった。症例2の矯正視力は右光覚弁,左1.0で右眼に朝顔症候群と網膜が全剥離した増殖硝子体網膜症を認めた。硝子体手術中に見つかった耳側の網膜裂孔に対して液空気置換後に網膜光凝固を行いシリコーンオイルを留置した。網膜は復位したが,術後5ヵ月で視力0となった。症例3の矯正視力は右0.03,左0で右眼に朝顔症候群と耳側の網膜裂孔による網膜剥離を認めた。強膜内陥術が施行され,網膜は復位した。最終受診時視力は右0.03であった。結論:筆者らの経験した本症4眼中3眼は,経過観察や手術で網膜が復位した。原因裂孔が見つからない場合の手術選択は,自然復位の可能性もあるため,剥離範囲の拡大の有無や,片眼性か両眼性か,他眼の視力などを考慮しながら慎重に行うのがよいと思われる。

＜文献概要＞目的:網膜と水晶体前嚢の異常を示し,水晶体再建術により良好な視力を得たアルポート症候群の症例の報告。症例:27歳男性。両眼の視力低下で当院紹介となった。既往歴にアルポート症候群で腎移植歴があった。所見:矯正視力は右0.3,左0.5で,両眼に前部円錐水晶体があり,両眼黄斑耳側に白色斑の散在を認め,光干渉断層計では同部位の網膜内層菲薄化を認めた。黄斑微小視野計では同部位に感度低下を認めず,多局所網膜電図でも同部位に一致した振幅の減弱はなかった。当院にて両眼の水晶体再建術を施行した。採取した前嚢は菲薄化し,亀裂を無数に認めた。水晶体上皮細胞の空胞化と細胞内小器官の減少が観察された。術後矯正視力は両眼とも1.0と改善した。結語:網膜形態異常と前部円錐水晶体を伴うアルポート症候群を経験した。検査上,前部円錐水晶体による屈折異常を認めたが,網膜菲薄部位に一致する明らかな機能的異常は認めず,水晶体再建術により良好な視力を得られた。前部円錐水晶体は,水晶体嚢の脆弱化による構造異常のためと考えられた。

Purpose: To determine adherence to face-down positioning (FDP) among patients who underwent vitrectomy and gas tamponade for macular hole (MH) repair. Method: A total of 69 patients (37 females and 32 males) who underwent primary vitrectomy for MH repair were studied. Nurses recorded whether the patient complied with FDP each time they examined the patient. FDP score was obtained from the nursing records patients were given a score of 1 if they complied with the FDP and 0 if they did not. The score was recorded four times per day for the first 3 postoperative days. A perfect FDP score was 12. Results: The mean ± standard deviation of the FDP scores was 10.6±1.8 (range: 4-12). Overall, 32 (46.4%) patients scored a perfect 12, and 7 (10.1%) patients scored ˂8. Failure of the MH closure was observed in only one patient (1.4%), who showed the poorest adherence to FDP (score =4). Consequently, the closure rate in patients with FDP score ˂7 (2/3, 66.7%) was significantly lower than in patients with an FDP score ≥7 (66/66, 100%) (P˂0.05, Fisher’s exact probability test). Conclusion: While adherence to FDP after MH surgery was better than that observed after vitrectomy for rhegmatogenous retinal detachments in our previous study, the percentage of patients with FDP scores, ˂8 did not differ. Statistically, the poor adherence to FDP can negatively impact the effectiveness of the surgery for MH repair.

Background: Iridocorneal endothelial (ICE) syndrome occurs mainly in young and middle-aged women and typically presents as a unilateral disease characterized by abnormalities of the iris and corneal endothelium. While the ICE syndrome is known to be associated with glaucoma and bullous keratopathy, to our knowledge, only two cases of ICE syndrome complicated with cystoid macular edema (CME) have been reported to date. In this paper, we report a case of ICE syndrome complicated with CME treated at our institution. Case presentation: The subject was a 51-year-old woman. In October 2013, she was examined by a primary care physician for blurred vision in her left eye. Dyscoria and abnormality of the corneal endothelium were observed, and the patient was diagnosed with ICE syndrome. In November of the same year, she was referred to our institution with a decrease in visual acuity and CME, both in her left eye. At initial examination, her best corrected decimal visual acuity was 1.0 (Snellen equivalent: 20/20) in the right eye and 0.5 (20/40) in the left eye. Intraocular pressure was 12 mmHg in both eyes. She was diagnosed with Cogan-Reese syndrome based on marked ectropion uveae, peripheral anterior synechia, and abnormalities of the corneal endothelium. Marked CME was observed on ophthalmoscopy and optical coherence tomography. A topical non-steroidal anti-inflammatory drug (nepafenac 0.1 %) was applied to the left eye four times daily from January 2014. Four weeks later, the CME had resolved and her visual acuity was 1.0 (20/20). Conclusion: While non-steroidal anti-inflammatory drugs and steroids did not appear to be effective in two previously reported cases of ICE syndrome complicated with CME, topical nepafenac was effective in this case. However, more such cases are needed before concluding that topical nepafenac is effective in this situation.

Purpose:To determine the compliance with the face-down positioning (FDP) of the patients who had undergone vitrectomy and gas tamponade.Methods:One hundred and twenty-seven patients, 45 females and 82 males, who had undergone primary vitrectomy and gas tamponade for rhegmatogenous retinal detachments were studied. The FDP score was determined as 4 per day for 3 days after the surgery. The patient was given a score of one if the nurse found that the patient was in the FDP and zero if not in the FDP. A perfect FDP score was 12.Results:The mean SD FDP score was 10.2 +/- 1.8 with a range of 3 to 12. Females (10.7 +/- 1.2) scored significantly higher than males (9.9 +/- 2.1) (Mann-Whitney U test: P &lt; 0.05). Patients who scored a perfect 12 were 38 (29.9%; female, 14:31.1%; male 24:29.3%). Low scorers &lt;8 were all males (12:14.6%) and no females (0:0.0%). Age did not seem to be related. Only 1 patient failed to achieve retinal attachment, although she had scored a perfect 12.Conclusion:The compliance was considerably varied among patients. Some patients failed nearly or more than half times, and they were mostly males. The significance of the FDP to treat rhegmatogenous retinal detachment needs to be examined in a further investigation.