Analysis of patients with good uncorrected distance and near vision after monofocal intraocular lens implantation

Nanavaty, Mayank A.; Vasavada, Abhay R.; Patel, Anil S.; Raj, Shetal M.; Desai, Tejas

doi:10.1016/j.jcrs.2006.03.021

Cited by 55 publications

(53 citation statements)

References 34 publications

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“…13 The correlation between the axis of astigmatism and age is significant because residual postsurgical WTR astigmatism has been shown to result in better distance Snellen visual acuity than OB astigmatism, 4 whereas residual ATR results in better unaided distance and near vision in some pseudophakics. 21 This therefore poses the question as to whether corneal stigmatism should be treated more aggressively in younger patients where WTR astigmatism is most prevalent. However, with the increasing popularity of toric presbyopic (multifocal and depth-of-focus) IOLs this becomes less significant for patients who can afford to pay for premium IOLs with guaranteed multifocality and depth of focus.…”

Section: Discussionmentioning

confidence: 99%

Relationship between age, corneal astigmatism, and ocular dimensions with reference to astigmatism in eyes undergoing routine cataract surgery

Wakefield

Annoh

Nanavaty

2016

Eye

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Purpose To assess the relationship between age, corneal astigmatism, and ocular dimensions with reference to astigmatism correction during cataract surgery. Methods In this cross-sectional study of right eyes of 2247 consecutive patients attending cataract surgery preassessment, data on patient demographics, axial length (AL), anterior chamber depth (ACD), and keratometric astigmatism were collected. Astigmatism was further analyzed as against-the-rule (ATR: steepest meridian 180 ± 30°), with-the-rule (WTR: 90 ± 30°), and oblique (OB: 30-60°or 120-150°). Results Mean age, AL, and ACD were 72.28 ± 13.84 years, 23.99 ± 1.85 mm and 3.08 ± 0.52 mm, respectively. In all, 20.4% eyes had ≤ 0.50 diopters (D), 55.2% had 0.51-1.50 D, 7.9% had 2.01-3.00 D, and 3.7% eyes had 43.00 D of astigmatism. Overall, 44.2% of eyes had corneal astigmatism 41.00 D. Average astigmatism in age ranges 40-49, 50-59, 60-69, 70-79, 80-89, and 90+ years were 0.82, 1.04, 1.04, 1.02, 1.15 and 2.01 D, respectively. The magnitude of preoperative astigmatism positively correlated with age (Po0.0001), with increasing and decreasing prevalence of ATR and WTR astigmatism, respectively, with advancing age. The magnitude of ATR astigmatism inversely correlates to AL (Po0.0001). ATR astigmatism is more prevalent with increasing magnitude of astigmatism (Po0.0001). Conclusions A majority of patients for cataract surgery have astigmatism between 0.51 and 1.5 D. ATR astigmatism increases, whereas WTR decreases with age. ATR astigmatism inversely correlates to AL. With increasing age, the magnitude of astigmatism increases and ATR astigmatism becomes increasingly prevalent. The likelihood of a patient requiring astigmatic correction increases with age.

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Section: Discussionmentioning

confidence: 99%

Relationship between age, corneal astigmatism, and ocular dimensions with reference to astigmatism in eyes undergoing routine cataract surgery

Wakefield

Annoh

Nanavaty

2016

Eye

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“…OS has been observed following in-the-bag IOL implantation with different IOL types and designs with varying results. 3,5,7,8,11,12,23,24 OS using pharmacological technique has been demonstrated to be 0.0870.26 mm for polymethyl methacryclate (PMMA), 5 0.4270.46 mm for hydrogel IOL, 5 and 0.2870.38 mm for foldable silicone IOL. 25 Moreover, Fukasaku and Marron ('Accommodation' video presented at the XVIth Congress of the European Society of Cataract & Refractive Surgeons, Nice, France, September 1998), using ultrasound biomicroscopy, showed that the IOL moves anteriorly by a mean of 0.32 mm during near vision; whereas Lesiewska-Junk H and Kahuzny J showed a mean shift of 0.42 mm without any medication.…”

Section: Discussionmentioning

confidence: 99%

“…28,29 We measured the OS by applying the pharmacological method in which we calculated the difference in the ACD. 3,10,11,24,[30][31][32][33][34][35] Although this is an indirect method, it is well-accepted as it does not rely on patient compliance during the measurement procedure. 3 Even though these pharmacological stimuli are nonphysiological, they are reported to be useful to find out the maximum potential of the optic shift.…”

Section: Discussionmentioning

confidence: 99%

“…36 Lesiewska Junk H and Kaluzny J measured the IOL shift as a difference in ACD during fixation at 5 m and then at 40 cm. 7 ACD measurement with immersion A-Scan ultrasonography 23,24,30,31 uses a contact method and accuracy depends on the experience of the examiner and compliance of the patient and results are difficult to interpret in pseudophakic eyes. 37,38 The Zeiss AC master would have been a better alternative in pseudophakic eyes.…”

Section: Discussionmentioning

confidence: 99%

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Anterior capsule cover and axial movement of intraocular lens

Nanavaty

Raj

Vasavada

et al. 2007

Eye

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Purpose To measure optic shift (OS) of a single piece monofocal intraocular lens (IOL) with varying relationships between anterior capsule cover and IOL optic. Methods This is a prospective randomized masked study of 150 eyes undergoing phacoemulsification. Eyes received either option: 360 o total capsule cover (group I); partial cover (group II); or no cover (group III). OS was calculated as difference in anterior chamber depth after administration of cyclopentolate 1% and pilocarpine 2% on IOLMaster s at separate visits at 6 months follow-up. Subsequently, using retro-illumination photographs, percentage area of capsule cover was calculated. OS within and between groups I and II was analyzed. The impact of one quartile change in area of capsule cover on percentage change in OS was measured for both groups. Unpaired t-test, correlation, and regression were applied. Results In groups I, II, and III, mean age of patients was 56.6876.38, 57.0977.34, 59.1576.35 years, respectively; mean OS (mm) was 1.2570.28, 1.2070.24; 0.9570.26 (P ¼ 0.013), respectively; and percentage area of capsule cover (%) was 47.35710.48, 33.83710.11, 0.1670.13 (P ¼ 0.001), respectively. Mean percentage area of capsule cover in group I vs group II was significant (P ¼ 0.001). OS was 1.2270.26 mm in groups I and II (combined) vs 0.9570.26 mm in group III (P ¼ 0.004, (0.06, 0.33)). OS in group I vs group II was not significant (P ¼ 0.46). Correlation coefficient was r ¼ 0.38 (Po0.001). With every increment on quartile (a quartile is any of the three values which divide the sorted data set into four equal parts, so that each part represents one-fourth of the sample or population) class of area of capsule cover the OS increased by 0.12 mm. ConclusionThe OS differed significantly between total and partial cover groups combined vs no cover group.

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“…3,4 To further assess the outcomes of extreme myopia with cataract patients, a prospective randomized controlled study was investigated on eyes with a refraction ≥-10D and AL ≥ 27.0 mm that had phacoemulsification and implanted with monofocal IOL. Particular attention was directed toward the difference between the "actual" and "predicted" postoperative spherical refractive power with its influence factors, and the accommodation amplitude in comparison with non-myopic eyes.…”

Section: Introductionmentioning

confidence: 99%

The Analysis of Refraction and Accommodation of Extreme Myopia with Cataract after Phacoemulsification and IOL Implantation

Al-Wesabi¹,

Yang²,

Li³

et al. 2016

IOSR

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Abstract:Background: To assess the refractive status of cataract patients with extreme myopia and to measure their accommodative capability after monofocal IOL implantation. Design: Prospective non-randomized study conducted at Tianjin Medical University Eye Centre.Participants: 18 patients with 34 extreme myopic eyes ≥27mm axial length), and 14 patients with 27 non-myopic eyes that had uneventful phacoemulsification and monofocal IOL implantation. Methods:The accommodation amplitude of the two groups was compared pre-and post-operatively using subjective minus-lenses-to-blur method. In the extreme myopic group, the postoperative target refraction was selected to be myopic, and they were evaluated for predicted postoperative spherical power consistency.

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Analysis of patients with good uncorrected distance and near vision after monofocal intraocular lens implantation

Abstract: The study suggests a significant role of ATR corneal astigmatism in good uncorrected distance and near vision after monofocal IOL implantation.

Cited by 55 publications

References 34 publications

Relationship between age, corneal astigmatism, and ocular dimensions with reference to astigmatism in eyes undergoing routine cataract surgery

Relationship between age, corneal astigmatism, and ocular dimensions with reference to astigmatism in eyes undergoing routine cataract surgery

Anterior capsule cover and axial movement of intraocular lens

The Analysis of Refraction and Accommodation of Extreme Myopia with Cataract after Phacoemulsification and IOL Implantation

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