Surgically induced astigmatism in manual small-incision cataract surgery: A comparative study between superotemporal and temporal scleral incisions

Sekharreddy, Machireddy R; Sugantharaj, Venkatesh; Hegde, Shruti Prabhat

doi:10.4103/tjosr.tjosr_23_19

TNOA J Ophthalmic Sci Res

2019

DOI: 10.4103/tjosr.tjosr_23_19

|View full text |Cite

Surgically induced astigmatism in manual small-incision cataract surgery: A comparative study between superotemporal and temporal scleral incisions

Machireddy R Sekharreddy

Venkatesh Sugantharaj

Shruti Prabhat Hegde

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2020

2024

Publication Types

Select...

Article4

Relationship

Self Cite0

Independent4

Authors

Journals

Cited by 4 publications

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Scleral tunnel based sutureless extracapsular cataract extraction: An approach to astigmatic correction in soft cataracts of nuclear sclerosis grade 1

Keisham¹,

Sharma²

2020

IJMS

View full text Add to dashboard Cite

Objectives: A study to see if scleral tunnel based sutureless extracapsular cataract extraction with superior quadrant approach can correct pre-existing corneal astigmatism in soft cataracts of non-structural protein 1 (NS1) grade nuclear sclerosis in patients of younger age profile having “with-the-rule” pattern of corneal astigmatism. Material and Methods: 47 eyes of 41 patients who underwent scleral tunnel based sutureless extracapsular cataract extraction were taken as the study group and a second group of 44 eyes of 38 patients who underwent clear corneal incision based phacoemulsification surgery formed the control group. Soft cataracts of NS1 grade nucleus having “with-the-rule” corneal astigmatism were included in the study. Keratometry measurements were done preoperatively and at 6 weeks post-operative follow-up by Zeiss IOLMaster. Results: Sutureless scleral tunnel based extracapsular cataract extraction was found to neutralize pre-existing corneal astigmatism if it was in range of 1.0–1.5 D. It was also found to change the pattern of astigmatism from “with-the-rule” to “against-the-rule” if the pre-operative astigmatism was in the range of 0.5–1.0 D with little change in the absolute value of the astigmatism. Conclusion: Patients with pre-existing with-the-rule corneal astigmatism undergoing scleral tunnel based sutureless extracapsular cataract extraction had reduced corneal astigmatism. Phacoemulsification, on the other hand, was found to be an astigmatically neutral surgery.

show abstract

Scleral tunnel based sutureless extracapsular cataract extraction: An approach to astigmatic correction in soft cataracts of nuclear sclerosis grade 1

Keisham¹,

Sharma²

2020

IJMS

View full text Add to dashboard Cite

show abstract

Manual Sutureless (MSICS) Cataract Surgery and Corneal Astigmatism

Almusmari,

A. Y. Abdulgade,

S. El-Allaky

2024

International Journal of Innovative Science and Research Techno

View full text Add to dashboard Cite

The most frequent preventable cause of blindness worldwide is cataracts. Manual Small Incision Cataract Surgery (MSICS) is still very much in use, even though cataract surgery is always changing. The resurgence of MSICS can be attributed to its low cost and safety, as it primarily uses easily sterilizable equipments and does not require sophisticated technology. This study aims to assess corneal astigmatism and manual sutureless (MSICS) cataract surgery after a month of follow-up. Forty individuals with cataract diagnoses were enrolled in this prospective study. During the procedure, a posterior chamber intraocular lens (IOL) implantation was done in addition to a superior manual minor incision under local anesthesia. The findings indicated that 15% or so of the patients experienced astigmatism following surgery. Also the findings revealed that sphere and cylinder refraction was significantly influenced by surgery. The means of sphere refraction before and after surgery were 3.93±6.37 and 0.93±0.98 D, while the corresponding means for cylinder refraction were 1.37±1.08 and 1.94±1.18 D. The results showed that means preoperative and postoperative Keratometry of cornea (K1) were 43.09±1.21 and 43.37±1.42 mm, while the corresponding means of Keratometry (K2) were 43.97±1.35 and 44.49±1.59 mm. The study concluded that the length of the superior incision (6.0 mm) may have contributed to the higher mean SIA than reported in other studies. However, more research is required to determine the impact of incision size on surgically produced astigmatism.

show abstract

Factors affecting surgically induced astigmatism in manual small-incision cataract surgery

Gupta

Goel

Kumar

2022

Indian Journal of Ophthalmology

View full text Add to dashboard Cite

Cataract is the most common cause of avoidable blindness in the world. While cataract surgery is continually evolving, manual small-incision cataract surgery (MSICS) still remains highly relevant, especially with the threat of the coronavirus disease 2019 (COVID-19) still looming large over the world. MSICS today has a renewed significance, since it does not involve the use of any advanced machinery and relies mainly on easily sterilizable instruments, thereby making it a safe and inexpensive option. A self-sealing valvular tunnel entry forms the basis of MSICS, and proper positioning and construction of the tunnel is imperative to the success of the surgery. With more and more people demanding spectacle independence after surgery, it becomes important to have a thorough understanding of the factors that may influence surgically induced astigmatism in MSICS. These include the incision location, size and shape, configuration of the sclero-corneal tunnel, pre-existing ocular pathology, role of sutures, amongst others. With proper knowledge, many of these factors can be modulated to achieve best results.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Surgically induced astigmatism in manual small-incision cataract surgery: A comparative study between superotemporal and temporal scleral incisions

Cited by 4 publications

References 13 publications

Scleral tunnel based sutureless extracapsular cataract extraction: An approach to astigmatic correction in soft cataracts of nuclear sclerosis grade 1

Scleral tunnel based sutureless extracapsular cataract extraction: An approach to astigmatic correction in soft cataracts of nuclear sclerosis grade 1

Manual Sutureless (MSICS) Cataract Surgery and Corneal Astigmatism

Factors affecting surgically induced astigmatism in manual small-incision cataract surgery

Contact Info

Product

Resources

About