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BMC Ophthalmology Jun 2024To evaluate the optical performance and safety of a new multifocal lens with a novel optical design featuring two additional foci (or intensifiers) in patients with... (Observational Study)
Observational Study
BACKGROUND
To evaluate the optical performance and safety of a new multifocal lens with a novel optical design featuring two additional foci (or intensifiers) in patients with cataract and presbyopia.
METHODS
In this single-center, non-randomized prospective observational study, 31 patients underwent implantation of the new multifocal IOL between March 2020 and November 2021 at a tertiary clinical center in Buenos Aires and Ramos Mejia, Argentina. Postoperative examinations with emphasis on uncorrected and corrected visual acuity at distance and near and at two different intermediate distances (80 cm and 60 cm) were performed during the 3 postoperative months.
RESULTS
Of the 31 patients who underwent implantation of the new IOL, 30 underwent bilateral surgery (61 eyes in total). At 3 months, all 61 eyes had an uncorrected distance visual acuity (UCDVA) of at least 0.15 logMAR; 57 eyes (93%) had an uncorrected distance visual acuity (UCDVA) of 0.1 logMAR and 27 eyes (44%) had an UCDVA of 0.0 logMAR. At 80 cm, 60 eyes (98%) had an uncorrected intermediate visual acuity (UCIVA) of at least 0.1 log MAR and 48 eyes (79%) had an UCIVA of 0.0 logMAR.
CONCLUSION
The new multifocal IOL with a novel optical concept (5 foci) showed a wide range of visual acuity especially at intermediate and near distances in patients undergoing cataract surgery. Uncorrected visual acuity was excellent at all tested distances, monocularly and binocularly, spectacle independence and patient satisfaction were high.
Topics: Humans; Visual Acuity; Prospective Studies; Female; Male; Aged; Multifocal Intraocular Lenses; Middle Aged; Prosthesis Design; Presbyopia; Refraction, Ocular; Lens Implantation, Intraocular; Pseudophakia; Phacoemulsification; Cataract; Lenses, Intraocular; Aged, 80 and over; Follow-Up Studies
PubMed: 38918765
DOI: 10.1186/s12886-024-03521-7 -
Clinical Ophthalmology (Auckland, N.Z.) 2024To assess the clinical outcomes, the rate of spectacle independence, and patient satisfaction of an enhanced depth of focus (EDOF) LuxSmart™ IOL targeted for...
PURPOSE
To assess the clinical outcomes, the rate of spectacle independence, and patient satisfaction of an enhanced depth of focus (EDOF) LuxSmart™ IOL targeted for mini-monovision in patients who had undergone bilateral cataract surgery.
METHODS
Twenty patients underwent bilateral LuxSmart IOL implantation with the non-dominant eye targeted for -0.50 diopters. Best-corrected distance (CDVA) and uncorrected distance visual acuity (UDVA), uncorrected intermediate visual acuity (UIVA) at 66 cm, uncorrected near visual acuity (UNVA) at 40 cm, and defocus curve were assessed. Patient-reported visual function was inquired by Catquest-9SF, and the rate of spectacle independence in all daily-life activities was calculated. The presence of photic phenomena was evaluated. A -value lower than 0.05 was considered statistically significant.
RESULTS
The mean IOL power was +21.50 ± 4D (16.5-26D), and all were non-toric. Thirty-seven (92.5%) eyes were within ±0.5D of predicted target. The postoperative MRSE was 0.06 ± 0.42D and -0.45 ± 0.22D in dominant and non-dominant eyes. Every patient achieved distance binocular vision better than 0.1 logMAR. The non-dominant eyes showed lower CDVA (<0.001). The UIVA was higher in non-dominant eyes (<0.001). Binocular uncorrected near visual acuity was 0.12 ± 0.1, and uncorrected near visual acuity was higher in non-dominant eyes (<0.001). LuxSmart IOL provided a sustained visual acuity of 0.3 logMAR or better between +1.00D and -2.50D. A total of 25% of patients reported frequent halos and glare. Despite achieving higher degrees of satisfaction, seven patients (35%) denied total spectacle independence in their daily-life activities, particularly for activities requiring continuous near vision.
CONCLUSION
This study shows that LuxSmart EDOF IOL in mini-monovision strategy performs well for distance and intermediate vision. Although visual acuity for near also achieved very good results, the considerable rate of spectacle dependence, in particular for near, and the rate of photic phenomena do not support this IOL to be safely implanted in patients desiring spectacle independence at time of cataract surgery.
PubMed: 38855014
DOI: 10.2147/OPTH.S459868 -
Clinical Ophthalmology (Auckland, N.Z.) 2024To determine if the changes in stereoacuity and aniseikonia, following bilateral implantation of presbyopia correcting intraocular lenses could be predicted from...
Stereoacuity and Aniseikonia: Evaluation Before and After Bilateral Implantation of Three Types of Presbyopia-Correcting Intraocular Lenses in Uncomplicated Phacoemulsification with Due Consideration of Interocular Differences in Higher Order Aberrations, Axial Lengths, Refractive Errors, and...
PURPOSE
To determine if the changes in stereoacuity and aniseikonia, following bilateral implantation of presbyopia correcting intraocular lenses could be predicted from preoperative measurements of higher order aberrations (HOAs), axial lengths (AL), refractive errors (RE) and corrected visual acuities (CVAs).
PATIENTS AND METHODS
Stereoacuity (Randot tests, @6m & 40cm, in steps of 20 arcsecs") vertical and horizontal aniseikonia (Awaya test @6m, in steps of 1%) with best correction and HOAs (Shack-Hartmann aberrometer) were measured before, 3 and 6 months after uncomplicated bilateral phacoemulsification. Twenty patients (I) underwent a mix-and-match procedure (Tecnis MF, ZKB00 in one eye and ZLB00 in the other), 17 (II) were implanted with a trifocal (AT LISA 839 triMP) and 18 (III) with a one-piece diffractive (Synergy OU) intraocular lens. The resultant aniseikonia (A) of vertical and horizontal pairs of aniseikonia measurements was calculated using the Pythagorean theorem. Twenty untreated age/gender matched cases were recruited as controls (IV).
RESULTS
The key results (p < 0.001) were a) stereoacuity at distance (SAD) and near (SAN) improved, A reduced in groups I, II & III remaining unchanged in group IV; b) some significant intergroup differences in SAD, SAN & A were detected at postop; c) at 6 months postop, changes (Δ=pre- minus postoperative value) correlated with preoperative values (x). Linear regression revealed, I ΔSAD=0.66x-57.47 [0.832, ±66.4], ΔSAN=0.96x-34.59 [0.821, ±16.9], ΔA=0.93A-2.12 [0.795, ±1.4] II ΔSAD=0.79x-62.91 [0.916, ±38.1], ΔSAN=0.96x-31.49 [0.892, ±8.0], ΔA=0.91A-0.91 [0.839, ±1.3] III ΔSAD=0.67x-35.50 [0.991, ±23.7], ΔSAN=0.88x-38.51[0.988, ±10.6], ΔA=0.86A-0.96 [0.900, ±1.3]. Figures in parentheses are the corresponding and ±limits of agreement between actual and estimated values. Definitive overarching associations connecting interocular differences in HOAs, AL, RE, and CVAs with SAD, SAN and A were not found.
CONCLUSION
Changes in stereoacuity and aniseikonia can be predicted using preoperative values. ΔSAN can be predicted within ±1, and ΔA within ±2, scale divisions. In group III ΔSAD can be predicted within ±1, and in group I ±3, scale divisions.
PubMed: 38855012
DOI: 10.2147/OPTH.S459684 -
Contact Lens & Anterior Eye : the... Jun 2024Corneal techniques for enhancing near and intermediate vision to correct presbyopia include surgical and contact lens treatment modalities. Broad approaches used...
Corneal techniques for enhancing near and intermediate vision to correct presbyopia include surgical and contact lens treatment modalities. Broad approaches used independently or in combination include correcting one eye for distant and the other for near or intermediate vision, (termed monovision or mini-monovision depending on the degree of anisometropia) and/or extending the eye's depth of focus [1]. This report provides an overview of the evidence for the treatment profile, safety, and efficacy of the range of corneal techniques currently available for managing presbyopia. The visual needs and expectations of the patient, their ocular characteristics, and prior history of surgery are critical considerations for patient selection and preoperative evaluation. Contraindications to refractive surgery include unstable refraction, corneal abnormalities, inadequate corneal thickness for the proposed ablation depth, ocular and systemic co-morbidities, uncontrolled mental health issues and unrealistic patient expectations. Laser refractive options for monovision include surface/stromal ablation techniques and keratorefractive lenticule extraction. Alteration of spherical aberration and multifocal ablation profiles are the primary means for increasing ocular depth of focus, using surface and non-surface laser refractive techniques. Corneal inlays use either small aperture optics to increase depth of field or modify the anterior corneal curvature to induce corneal multifocality. Presbyopia correction by conductive keratoplasty involves application of radiofrequency energy to the mid-peripheral corneal stroma which leads to mid-peripheral corneal shrinkage, inducing central corneal steepening. Hyperopic orthokeratology lens fitting can induce spherical aberration and correct some level of presbyopia. Postoperative management, and consideration of potential complications, varies according to technique applied and the time to restore corneal stability, but a minimum of 3 months of follow-up is recommended after corneal refractive procedures. Ongoing follow-up is important in orthokeratology and longer-term follow-up may be required in the event of late complications following corneal inlay surgery.
PubMed: 38851946
DOI: 10.1016/j.clae.2024.102190 -
Graefe's Archive For Clinical and... Jun 2024This study aimed to assess the optical quality of myopic and presbyopic IPCLs with different additional powers, and to investigate the effects of pupil size on the...
PURPOSE
This study aimed to assess the optical quality of myopic and presbyopic IPCLs with different additional powers, and to investigate the effects of pupil size on the optical quality of these IPCLs using an in-vitro modulation transfer function (MTF) measurement system.
METHODS
Linear scatter functions (LSFs) were recorded using the OPAL Vector system and an eye phantom consisting of wet cells filled with a balanced salt solution. A myopic IPCL or a presbyopic IPCL was placed in the posterior chamber of this model. The MTF was calculated from the LSF using the fast Fourier transform techniques. The effective apertures were set at 2.0 to 5.0 mm in 1.0 mm steps.
RESULTS
The in-focus MTF values of the myopic IPCL and presbyopic IPCL with additional powers of + 2.0 and + 4.0 diopters at 100 cycles/mm for an effective aperture of 3.0 mm were 43%, 27%, and 24%, respectively. The in-focus MTF value of both myopic and presbyopic IPCLs was the highest when the effective aperture was set at 3.0 mm, and it gradually worsened when the effective aperture became larger than 3.0 mm at 20, 60, and 100 cycles/mm.
CONCLUSIONS
Both myopic and presbyopic IPCLs provided excellent MTF values, but the additional power profile can deteriorate optical performance in presbyopic IPCL-implanted eyes, even with a low additional power. Pupil size can influence visual quality in IPCL-implanted eyes for both myopia and presbyopia.
PubMed: 38842594
DOI: 10.1007/s00417-024-06539-1 -
Community Eye Health 2024
PubMed: 38827967
DOI: No ID Found -
Community Eye Health 2024
PubMed: 38827964
DOI: No ID Found -
Clinical Ophthalmology (Auckland, N.Z.) 2024To compare Barrett TK Universal II and Barrett Universal II TCRP calculations in the power calculations for 3 presbyopia-correcting intraocular lenses (PC-IOL).
PURPOSE
To compare Barrett TK Universal II and Barrett Universal II TCRP calculations in the power calculations for 3 presbyopia-correcting intraocular lenses (PC-IOL).
METHODS
This observational study involved 64 eyes from 64 patients who prepared to undergo extraction of crystalline lenses combined with PC-IOL (Symfony ZXR00, PanOptix TFNT00, or AT LISA tri 839MP) implantation. All eyes underwent ocular biometric measurements with IOLMaster 700 and Pentacam HR, and the interdevice agreement of measurements including total keratometry (TK, IOLMaster 700) and total corneal refractive power (TCRP, Pentacam HR) was evaluated. IOL power calculations were performed using TK-based Barrett TK Universal II and TCRP-based Barrett Universal II calculations, respectively.
RESULTS
Paired -tests showed that the differences in white-to-white diameter, central corneal thickness, anterior chamber depth, and mean TK between IOLMaster 700 and Pentacam HR were slight but significant (all P<0.05), and the differences in recommended IOL power for emmetropia between two Barrett calculations were also significant in 3 PC-IOLs (all P<0.05). The ROC curve showed that the AUC was 0.917 (95% CI, 0.820-0.971) for the absolute value of the difference between TK and TCRP in discriminating the difference of ≥ ±0.5 D in predicted IOL power with best cutoff values of 0.4 D.
CONCLUSION
The novel Barrett TK Universal II formula built in IOLMaster 700 is comparable to TCRP-based Barrett Universal II calculation for IOL power calculation of PC-IOLs, and the convenience of using the Barrett TK Universal II formula should be founded on measurement consistency between devices.
PubMed: 38818525
DOI: 10.2147/OPTH.S461195 -
Contact Lens & Anterior Eye : the... May 2024With over a billion adults worldwide currently affected, presbyopia remains a ubiquitous, global problem. Despite over a century of study, the precise mechanism of...
With over a billion adults worldwide currently affected, presbyopia remains a ubiquitous, global problem. Despite over a century of study, the precise mechanism of ocular accommodation and presbyopia progression remains a topic of debate. Accordingly, this narrative review outlines the lenticular and extralenticular components of accommodation together with the impact of age on the accommodative apparatus, neural control of accommodation, models of accommodation, the impact of presbyopia on retinal image quality, and both historic and contemporary theories of presbyopia.
PubMed: 38796331
DOI: 10.1016/j.clae.2024.102185 -
Journal of Clinical Medicine May 2024Presbyopia, a common age-related refractive error, affects over a billion people globally and significantly impacts daily life. This retrospective study analyzed 288...
Outcomes of Corneal Compound Myopic Astigmatism with Presbyopia by Zeiss PRESBYOND Laser Blended Vision LASIK Using Default CRS-Master Target Refractions for Reduced Anisometropia.
Presbyopia, a common age-related refractive error, affects over a billion people globally and significantly impacts daily life. This retrospective study analyzed 288 eyes of 144 patients undergoing LBV PRESBYOND treatment for myopic presbyopia with astigmatism, aiming to evaluate precision, efficacy, safety, and stability over six months. Key findings include high efficacy, with 99% of distance-eyes achieving uncorrected distance visual acuity (UDVA) of 20/25 or better, and 85% of near-eyes achieving UDVA of 20/32 or better. The results show excellent refractive outcomes, with 99% of long-sighted eyes and 97% of near-sighted eyes having a postoperative spherical equivalent within ±1.00 D. Safety was demonstrated by no loss of two or more Snellen lines after treatment, with 94% of patients maintaining corrected distance visual acuity (CDVA) before and after surgery. Overall, LBV PRESBYOND proved effective, safe, and well tolerated for myopic presbyopia correction, offering satisfactory visual outcomes and potential spectacle independence for various distances. This study underscores the importance of individualized treatment based on patient age, highlighting the positive impact of binocular summation on visual function. This study contributes to the growing body of evidence supporting LBV PRESBYOND as a viable option for addressing presbyopic myopia, offering insights into its efficacy and safety profile. Further research could explore postoperative stereopsis and long-term outcomes to enhance understanding and refine treatment protocols.
PubMed: 38792550
DOI: 10.3390/jcm13103011