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   Table of Contents      
LETTER TO THE EDITOR
Year : 2018  |  Volume : 66  |  Issue : 8  |  Page : 1227-1228

Planning a new intraocular lens library in the Indian scenario


1 Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India
2 Department of Ophthalmology, All India Institute of Medical Sciences, Bhopal, Madhya Pradesh, India

Date of Web Publication23-Jul-2018

Correspondence Address:
Dr. Brijesh Takkar
Department of Ophthalmology, All India Institute of Medical Sciences, Saket Nagar, Bhopal - 462 020, Madhya Pradesh
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijo.IJO_634_18

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How to cite this article:
Saluja G, Takkar B, Agarwal E, Sharma B, Khokhar S. Planning a new intraocular lens library in the Indian scenario. Indian J Ophthalmol 2018;66:1227-8

How to cite this URL:
Saluja G, Takkar B, Agarwal E, Sharma B, Khokhar S. Planning a new intraocular lens library in the Indian scenario. Indian J Ophthalmol [serial online] 2018 [cited 2020 Sep 27];66:1227-8. Available from: http://www.ijo.in/text.asp?2018/66/8/1227/237345



Sir,

Cataract is the most common cause of avoidable blindness in India.[1],[2],[3] Implantation of an intraocular lens (IOL) has become a standard care and the National Health-care Policy of India has set the norms of 95% surgeries to have IOL implantation by 2020.[4] It is essential for the new institutes aiming for high-volume surgeries to have an IOL library.[5] We evaluated the ocular biometry of patients undergoing cataract surgery retrospectively to identify the requisite IOL powers as no such Indian database is available.

Patients of age more than 40 years with no other ocular history were included. Axial length (AL) in millimeters and keratometry (K) in diopters were measured using a single optical biometer. IOL power was calculated with the biometer using modified SRK-2 formula for the most minimal myopic refractive error possible. The A-constant was set at 118.7 for these calculations, while surgeon factor was set as ± 0.5 D.

Totally 850 eyes were included in the analysis. Mean age of the patients was 60.25 ± 9.10 years (range:- 40–83 years), while 606 were males (71%). Mean AL and keratometry were 23.23 ± 1.18 mm and 44.11 ± 1.86 D, respectively. The mean IOL power was measured as 21.08 ± 7.36 D (3–31). The distribution of the IOL powers is presented in [Figure 1]. Our results show that the most commonly required IOL powers (90% cases) in the Indian setting are in the range of 18 D–24.5 D. Further, nearly two-thirds of them range between 19 D and 23 D. It should be noted here the IOL powers in this study have been calculated using a single A-constant, and minor variations can thus be expected. The results of our study will be helpful toward setting up of IOL libraries in new Indian facilities.
Figure 1: Histogram depicting percentages of different intraocular lens powers required in Indian patients undergoing cataract surgery

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Financial support and sponsorship

Nil.

Conflicts of interest

There are no conflicts of interest.



 
  References Top

1.
Neena J, Rachel J, Praveen V, Murthy GV; Rapid Assessment of Avoidable Blindness India Study Group. Rapid assessment of avoidable blindness in India. PLoS One 2008;3:e2867.  Back to cited text no. 1
    
2.
Murthy GV, Gupta SK, Bachani D, Jose R, John N. Current estimates of blindness in India. Br J Ophthalmol 2005;89:257-60.  Back to cited text no. 2
    
3.
Dandona L, Dandona R, John RK. Estimation of blindness in India from 2000 through 2020: Implications for the blindness control policy. Natl Med J India 2001;14:327-34.  Back to cited text no. 3
    
4.
Vemparala R, Gupta P. National Programme for Control of Blindness (NPCB) in the 12th five-year plan: An overview. Delhi J Ophthalmol 2017;27:290-2.  Back to cited text no. 4
    
5.
Foster A. Cataract and “Vision 2020-the right to sight” initiative. Br J Ophthalmol 2001;85:635-7.  Back to cited text no. 5
    


    Figures

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