Apparent chord mu and actual chord mu and their clinical value
The apparent chord mu (chord μ) and actual chord μ have direct applicability to the success of premium multifocal intraocular lens (IOL) surgery in terms of patient acceptance, neuroadaptation, and so forth. Understanding the difference in these terms and the normal values is critical to their use clinically. (Source: Journal of Cataract and Refractive Surgery)
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Authors: Jack T. Holladay Tags: Correspondence Source Type: research

Assessment of optic edge and the posterior capsule junction on optical coherence tomography
After cataract surgery, a frequent challenge faced by the anterior segment surgeon is posterior capsule opacification (PCO). Therefore, it is necessary to tackle this intraoperatively by thoroughly removing the lens capsule epithelial cells.1 A square-edged intraocular lens (IOL) optic has also been shown to reduce the occurrence of PCO.1 Determining the actual changes along the square edges of the IOL and the capsule junction is important in understanding why PCO develops. (Source: Journal of Cataract and Refractive Surgery)
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Authors: Amar Pujari, Subodh Lakra, Tarjani Makwana, Namrata Sharma Tags: Correspondence Source Type: research

Simple and precise patient satisfaction questionnaire for laser refractive surgery
The editorial by Kohnen1 on questionnaires for cataract and refractive surgery outlines different methods, including the National Eye Institute Visual Functioning Questionnaire-25 and Quality of Vision questionnaire. These are validated tools but are extensive and time-consuming for patients and physicians, especially if they are created in-office and administered to all patients as a part of routine assessment. In the same issue, Akman et  al.2 describe patient-reported quality of life after trifocal intraocular lens implantation using the National Eye Institute Visual Function Questionnaire-14 (VF-14 QoL questionnaire)....
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Authors: Stine E. Nielsen, Anne M. Eriksen, Anders R. Ivarsen, Henrik Sejersen, Christina M øller, Jesper Hjortdal Tags: Letter Source Type: research

Reply
In the editorial, my intention was to highlight the use of questionnaires. There are certainly more ways than one to conduct questionnaires, as shown by Nielsen in their discussion about their PROM instrument. It should be emphasized that the ophthalmology community could develop a standard questionnaire so that the results could be more accurately compared. (Source: Journal of Cataract and Refractive Surgery)
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Authors: Thomas Kohnen Tags: Letter Source Type: research

Flattening effect is the key parameter for toric calculator
In the study by Holladay and Pettit,1 we noted the authors' keratometric definition of incisional surgically induced astigmatism (SIA) (SIAK = Kpost  − Kpre), where SIA is the keratometric SIA, Kpost is the postoperative keratometric astigmatism, and Kpre is the preoperative keratometric astigmatism. (Source: Journal of Cataract and Refractive Surgery)
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Authors: Joaquim Fern ández-Rosés, Àlex Julien, José Lamarca, Rafael I. Barraquer Tags: Letter Source Type: research

Reply
The SIAK value is the vector difference between the postoperative astigmatism and preoperative astigmatism. The vector should theoretically be a Jackson cross according to Gauss' law of mean curvature, requiring equal amounts of orthogonal flattening and steeping of the cornea.1 Unfortunately, the primary cataract incision is not paired (symmetrical) and is often accompanied by an unpaired secondary incision superiorly; thus, the resulting effect is rarely symmetrical (Figure  1). With multiple incisions, the SIAK vector is wherever the vector difference dictates. (Source: Journal of Cataract and Refractive Surgery)
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Authors: Jack T. Holladay Tags: Letter Source Type: research

LogMAR gain: Insufficient parameter to conclude HbA1c levels do not affect cataract surgery outcomes
In their recent paper, Liu et  al.1 reported that patients gained an equal amount of lines of corrected distance visual acuity (CDVA) after cataract surgery regardless of the presence of diabetes and diabetic retinopathy (DR) status. Furthermore, the gain in CDVA was independent of the patients' preoperative serum hemoglobin A1 c (HbA1c) levels. These conclusions were drawn by univariate and multivariate analysis of the following CDVA parameters: (1) the mean change in logarithm of the minimum angle of resolution (logMAR) units and (2) the proportion of eyes achieving a Snellen CDVA of 20/20. (Source: Journal of Cataract ...
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Authors: Raimo Tuuminen, Andrzej Grzybowski Tags: Letter Source Type: research

Lens capsule-related complications of femtosecond laser –assisted capsulotomy versus manual capsulorhexis for white cataracts
The study by Zhu et  al.1 included an impressive number of white cataracts (n = 132) that were removed by femtosecond laser–assisted cataract surgery (FLACS group) or conventional phacoemulsification cataract surgery (CPCS group). The authors correctly point out that advanced cataracts present several challenges f or the surgeon. In particular, the increased intracapsular pressure caused by liquefaction of the cortex can render capsulorhexis creation extremely difficult. Having used the femtosecond laser in a series of difficult situations such as pediatric cataract, traumatic cataract, Marfan syndrome, and i ntumesce...
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Authors: H. Burkhard Dick, Tim Schultz, Ronald D. Gerste Tags: Letter Source Type: research

Reply
Drs. Tuuminen and Grzybowski assert that the gain in logMAR is an “insufficient parameter to conclude HbA1c levels do not affect cataract surgery outcomes” because the baseline CDVA differs between diabetes subgroups. We agree that the gain in logMAR is an incomplete outcome measure; however, we disagree that it is inappropriate. The gain in logMAR acuity is t he gold standard in assessing surgical outcomes. Our controlled longitudinal risk-adjusted cohort study of more than 65 000 community-based patients showed that irrespective of the severity of the DR, the mean improvement in CDVA was 4.5 lines, a meaningful imp...
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Authors: Lisa Herrinton, Liyan Liu, James Carolan, Neal Shorstein Tags: Letter Source Type: research

Photo Award
Category: Slitlamp Photography –1st Place (Source: Journal of Cataract and Refractive Surgery)
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Source Type: research

You don't know what you don't know
Visual outcomes are the primary measure of success after cataract surgery. When postoperative follow-up is inconsistent, the quantity and quality of information obtained is compromised. This information gap can handicap our assessments of patient outcomes and limit opportunities for quality improvement. While some studies have argued for the sufficiency of an early follow-up visual acuity measurement and subsequent follow-up visits only for those patients who return without prompting,1 others have presented arguments for more rigorous follow-up and data collection even in low-resource or remote-practice settings. (Source: ...
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Authors: William J. Dupps Tags: From the editor Source Type: research

Editorial Board
(Source: Journal of Cataract and Refractive Surgery)
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Source Type: research

Masthead
(Source: Journal of Cataract and Refractive Surgery)
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Source Type: research

Table of Contents
(Source: Journal of Cataract and Refractive Surgery)
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Source Type: research

Visual Acuity Chart
(Source: Journal of Cataract and Refractive Surgery)
Source: Journal of Cataract and Refractive Surgery - July 29, 2019 Category: Opthalmology Source Type: research