{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,12]],"date-time":"2026-05-12T00:47:38Z","timestamp":1778546858854,"version":"3.51.4"},"reference-count":29,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2020,9,10]],"date-time":"2020-09-10T00:00:00Z","timestamp":1599696000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Acta Ophthalmologica"],"published-print":{"date-parts":[[2021,5]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Purpose<\/jats:title><jats:p>To quantify the intraoperative parameters and postoperative outcomes after using the phaco chop technique in one eye and drill\u2010and\u2010crack technique in the other eye in patients with bilateral dense brunescent cataract.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>The Lens Opacities Classification System III grading system was used to select 132 eyes of 66 patients with bilateral nuclear opalescence (NO) grade NO4 or grade NO5. One eye in each patient with bilateral dense brunescent cataract was subjected to phacoemulsification using the phaco chop technique, while the other eye was subjected to phacoemulsification with the drill\u2010and\u2010crack technique for nucleus disassembly. The intraoperative parameters were quantified. Surgical outcome was assessed preoperatively and 1\u00a0day, 4\u00a0weeks and 12\u00a0weeks postoperatively, and the outcomes of the two techniques were compared.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>There was no significant difference between the techniques in operative parameters [cumulative dissipated energy (p\u00a0=\u00a00.74), surgical time (p\u00a0=\u00a00.68) or surgical difficulty during nucleus disassembly (p\u00a0=\u00a00.80)]. There was no significant difference in the postoperative change in central corneal thickness between the techniques at day 1, 4\u00a0weeks and 12\u00a0weeks or in corneal endothelial cell density loss at 4 and 12\u00a0weeks (p\u00a0&gt;\u00a00.05). There was no significant difference between the techniques in the mean corrected distance visual acuity (logarithm of the minimum angle resolution) at 4\u00a0weeks postoperatively (p\u00a0=\u00a00.25).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>The phaco chop and drill\u2010and\u2010crack techniques are equally effective for disassembly of hard NO4 and NO5 cataracts.<\/jats:p><\/jats:sec>","DOI":"10.1111\/aos.14582","type":"journal-article","created":{"date-parts":[[2020,9,24]],"date-time":"2020-09-24T16:26:28Z","timestamp":1600964788000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":9,"title":["Comparison of the phaco chop and drill\u2010and\u2010crack techniques for phacoemulsification of hard cataracts: A fellow eye study"],"prefix":"10.1111","volume":"99","author":[{"given":"Hazem","family":"Abdelmotaal","sequence":"first","affiliation":[{"name":"Department of Ophthalmology Faculty of medicine Assiut University Assiut Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9383-9520","authenticated-orcid":false,"given":"Mahmoud","family":"Abdel\u2010Radi","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology Faculty of medicine Assiut University Assiut Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mahmoud F.","family":"Rateb","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology Faculty of medicine Assiut University Assiut Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2011-6620","authenticated-orcid":false,"given":"Zeiad H.","family":"Eldaly","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology Faculty of medicine Assiut University Assiut Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3437-6984","authenticated-orcid":false,"given":"Khaled","family":"Abdelazeem","sequence":"additional","affiliation":[{"name":"Department of Ophthalmology Faculty of medicine Assiut University Assiut Egypt"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2020,9,10]]},"reference":[{"key":"e_1_2_5_2_1","doi-asserted-by":"publisher","DOI":"10.1136\/bjo.70.6.411"},{"key":"e_1_2_5_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2009.05.026"},{"key":"e_1_2_5_4_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jcrs.2012.07.003"},{"key":"e_1_2_5_5_1","first-page":"58","article-title":"Under the Specular Microscope: take a closer look at the clinical and financial benefits that non\u2010contact specular microscopy could offer your practice","volume":"149","author":"Bonnell AJ","year":"2012","journal-title":"Rev Optom"},{"key":"e_1_2_5_6_1","first-page":"202","article-title":"Converting to phaco chop: why? 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