indian journal of ophthalmology

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INDIAN JOURNAL OF OPHTHALMOLOGY Contents Vol. 56

No. 2

March-April 2008

Guest Editorial First World Glaucoma day, March 6, 2008: Tackling glaucoma challenges in India

97

R George, L Vijaya

Original Articles Optic disc topography of normal Indian eyes: An assessment using optical coherence tomography

99

Shaun Dacosta, Sheena Bilal, Babu Rajendran, P Janakiraman

The probable associations for corticocapsular adhesions in patients undergoing cataract surgery: A clinic-based observational study

103

Abhay R Vasavada, Shetal M Raj, M R Praveen, Viraj A Vasavada, Vaishali A Vasavada

Effects of intraoperative oxidated regenerated cellulose on wound healing reaction after glaucoma filtration surgery: A comparative study with Interceed and Surgicel

109

Akyol Nuray, Akpolat Nusret

Optic nerve sheath decompression for visual loss in intracranial hypertension: Report from a tertiary care center in South India 115 Suneetha Nithyanandam, George J Manayath, Ravindra R Battu

Evaluation of distance and near stereoacuity and fusional vergence in intermittent exotropia 121 Pradeep Sharma, Rohit Saxena, Makarand Narvekar, Ritu Gadia, Vimla Menon

Surgical outcome in monocular elevation deficit: A retrospective interventional study

127

Rakhi Bandyopadhyay, Shashikant Shetty, P Vijayalakshmi

Ophthalmology Practice Learning micro incision surgery without the learning curve

135

Ravi Thomas, Shoba Navin, Rajul Parikh

Community Eye Care Comparison of refractive errors and factors associated with spectacle use in a rural and urban South Indian population

139

Raju Prema, George Ronnie, Ramesh Sathyamangalam Ve, Arvind Hemamalini, Mani Baskaran, Govindaswamy Kumaramanickavel, McCarty Catherine, Lingam Vijaya

Brief Communications Inherited partial aniridia, microcornea with high myopia and Bergmeister’s papilla: A new phenotypic expression 145 Prashant Naithani, Ankur Sinha, Viney Gupta

Management of an irradiated anophthalmic socket following dermis-fat graft rejection: A case report

147

Kuldeep Raizada, Debraj Shome, Santosh G Honavar

Suprachoroidal collection of internal tamponading agents through a choroidal hole

149

Lingam Gopal, Nishank Mittal, Aditya Verma

15

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A case of Goldenhar-Gorlin syndrome with unusual association of hypoplastic thumb

150

Amitava Das, Biswarup Ray, Debabrata Das, Somnath Das

Ocular adnexal lymphoma in the Northeast Indian population

153

Dipankar Das, Panna Deka, Kasturi Bhattacharjee, Jayanta Kumar Das, Ganesh Kuri, Akshay Chandra Deka, Harsha Bhattacharjee

Direct aspiration of capsular bag material in a case of sequestered endophthalmitis

155

Lingam Gopal, Amit Nagpal, Aditya Verma

Clinical profile and visual outcome in cluster endophthalmitis following cataract surgery in Central India 157 Sumeet Malhotra, Partha Mandal, Gopal Patanker, Deepshikha Agrawal

Visual field defect as a presenting sign for hemorrhagic stroke caused by sildenafil

159

Morteza Mehdizadeh, Hamid Hosseini, Taher Yazdchi, Siamak Farahangiz

A case of neurofibromatosis 1 presenting with optic pathway glioma with an early onset and an aggressive course

161

Suma Ganesh, Archana Gupta, Manish Sharma, Sandeep Bhuttan

Combination of photodynamic therapy with intravitreal bevacizumab for post-peribulbar anesthesia (penetrating trauma)-persistent choroidal neovascular membrane

163

Nikunj Shah, Urmi Shah

Letters to the Editor Oculosporidiosis in a tertiary care hospital of Western Orissa, India

165

Archana Sood, Badri Badhu

Authors’ reply

165

Ravindra K Chowdhury, Sharmistha Behera, Debendranath Bhuyan, Gunasagar Das

Retinopathy of prematurity in Asian Indian babies weighing greater than 1250 g at birth

166

Niranjan Kumar, Vivek B Wani, Khalid Al Sabti

Authors’ reply

166

Anand Vinekar, Mangat R Dogra, Tiakumzuk Sangtam, Anil Narang, Amod Gupta

Spontaneous late-onset comitant acute non accommodative esotropia in children

167

Pramod Kumar Pandey, Pankaj Vats, Navjot Kaur, Ajit G Kulkarni

Author’s reply

168

Mihir Kothari

Pigmented squamous cell carcinoma of the limbus area: A rare case

169

E Shirzadeh

‘SIA-Soft’: A new software to calculate surgically induced astigmatism in comparison with manual mathematics by vector method

170

Samar K Basak, Soham Basak, Aritra Roy Chowdhury

Greenish discoloration of silicone intraocular lens

170

Rengaraj Venkatesh, Thangavel Thirumalai Kumar, Ravilla D Ravindran

Warming device for computer vision syndrome K Ilango

16

171

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170

Indian Journal of Ophthalmology

‘SIA-Soft’: A new software to calculate surgically induced astigmatism in comparison with manual mathematics by vector method Dear Editor, Surgically induced astigmatism (SIA) is not just the simple subtraction of keratometric or K-values before and after the operation. It involves vector mathematics with algebra and trigonometry.1 For every ophthalmologist, it is not possible to go back to 12 (10 + 2) standard mathematical knowledge and calculate SIA. Even if one were to calculate it correctly, it takes a lot of time and effort for a number of patients. Despite this difficulty, calculating SIA allows the surgeon to have an accurate picture of how his surgery is affecting the corneal curvature and helps improve his surgery. Computers can be programmed to do all this tedious mathematical calculations for us and that is why this software ‘SIA-Soft’ has been developed. The basic mathematics behind this software is the ‘gold standard’ vector analysis of SIA.2 We have validated the accuracy and operating feasibility of this Windows-based software for calculating SIA for a number of patients in comparison with gold standard mathematical vector analysis done manually. The preoperative and postoperative keratometric data (K-values) with the axes of 30 different patients were taken randomly from our cataract clinic either from manual small incision cataract surgery (MSICS) or phacoemulsification category. These 30 sets of data were given to two co-authors for calculation of SIA and the angles of error in a masked way. The Þrst co-author (a student of Class XII) was asked to calculate the SIA on the basis of pure mathematics and submit the data for single and multiple patients and he was also asked to give the mean and standard deviation (SD). Similarly, the second co-author was asked to calculate SIA using the software with the same set of data. Both of them were asked to submit the Þnal data to a third observer for Þnal analysis. The overall results by two different observers are given in Table 1. Average time taken for each calculation for the Þrst observer by mathematical method was 5.27 ± 0.48 min and for the second observer by using SIA-Soft software was 6.15 ± 0.50 sec (*P