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October 2017 Volume XXXV No 3 insightScientifi c Journal of MEDICAL & VISION RESEARCH FOUNDATIONS www.sankaranethralaya.org Editor: Parthopratim Dutta Majumder insight Scientifi c Journal of Medical & Vision Research Foundations Sankara Nethralaya – The Temple of the Eye. Year: 2017 It was in 1976 when addressing a group of doctors, His Holiness Sri Jayendra Saraswathi, the Sankaracharya of the Kanchi Kamakoti Peetam spoke of the need to create a hospital with a missionary spirit. His words marked the Issue: Vol. XXXV | No. 3 | October 2017 | Pages 1–34 beginning of a long journey to do God’s own work. On the command of His Holiness, Dr. Sengamedu Srinivasa Badrinath, along with a group of philanthropists founded a charitable not-for-profi t eye hospital. Sankara Nethralaya today has grown into a super specialty institution for ophthalmic care and receives patients from all over the country and abroad. It has gained international excellence and is acclaimed for its quality care and compassion. The Sankara Nethralaya family today has Typeset at: Nova Techset (P) Ltd., Chennai, India over 1400 individuals with one vision – to propagate the Printed at: Gnanodaya Press, Chennai, India Nethralaya philosophy; the place of our work is an Alaya and Work will be our worship, which we shall do with sincerity, ©Medical and Vision Research Foundations dedication and utmost love with a missionary spirit. Contents Guest Editorial: What is new in paediatric ophthalmology? 1 Sujata Guha Review: Implants in glaucoma: a minor review 3 Kumar Ravi, Prashant Srivastava, Mayav Movdawalla, Surajit Sen and Prerna Kedia Major Review: Central serous chorioretinopathy (CSCR) 10 Sudipta Das and Debmalya Das Recent Advances: Synopsis of TFOS (tear film and ocular surface society) DEWS (dry eye work shop) II Report, 2017 21 Ravi Daulat Barbhaya and Mona Bhargava Case Report: Resolution of cystoid macular edema by topical dorzolamide in a case of central serous chorioretinopathy: a case report 25 Debmalya Das and Eesh Nigam Case Report: Metallic orbital foreign body: to dive or not to dive? 27 Neha Shrirao Mehta Case Report: Sixth nerve palsy: a rare presentation of parapharyngeal abscess caused by Mycobacterium abscessus 30 Bhavna Bhamare, Siddharth Sheth, Shruti Mittal, Tanmoy Biswas, Sudipta Sahana and Sujata Guha Last Word: Role of polymerase chain reaction in current ophthalmology practice 33 Nicey Roy Thomas, Kumar Saurabh and Rupak Roy Inquiries or comments may be mailed to the editor at [email protected] Guest Editorial What is new in paediatric ophthalmology? Dr. Sujata Guha Paediatric ophthalmology – The myopexias, transpositions, oblique muscle reces- Director oldest subspecialty in ophthal- sions, and adjustable sutures, even in the presence Sankara Nethralaya, mology and an area which of restricted motility.3 The technique first Kolkata continues to intrigue me even described by Gobin for access to rectus muscles Email: [email protected] after 20 years of practice! The has been adapted for other procedures. Muscles practice of ophthalmology in are not accessed through one large opening, but children is replete with chal- using several keyhole openings placed where lenges, starting from difficult examination to the needed for the surgical steps, ensuring they are far special needs of the immature visual system. The away from the limbus. The benefits include lesser fact that these young patients have an entire life- corneal complications, avoiding disruption of the time to live with the consequences of our inter- limbus, increased patient comfort, faster recovery, vention makes it imperative that we offer them easier to perform resurgery. Mini-plication is a the best care we can. While it is true, that research new rectus muscle tightening procedure for the is often skewed towards the older population, rec- correction of small- angle strabismus that can be ognition of special needs of our young patients, performed under topical anaesthesia. The results has directed more and more trials to address the have been encouraging for correction of diplopia diseases in paediatric population. Here are the in patients with small angle deviations up to 20 highlights of what is new in the management of prism diopters.4 Mini-tenotomy is a similar pro- some common paediatric eye conditions. cedure for weakening of recti. Although it has a Amblyopia is one of the most commonly long learning curve, MISS is a technique which encountered conditions in paediatric ophthalmol- must be explored by every strabismus surgeon. ogy practice. For more than 100 years, amblyopia, The transposition surgeries for incomitant or the ‘Lazy eye’ as it is often referred to, was strabismus are undergoing a paradigm shift. believed to be a result of cortical suppression of a Transposition surgeries commonly performed blurred or disconjugated image. The new emerging today are superior rectus transposition (SRT), picture of amblyopia is that of a monocular conse- modified Nishida’s procedure, and Knapp’spro- quence of a primary binocular obstacle to normal cedure. SRT with or with medial rectus recessions visual development. The focus is now on explor- is very useful in esotropic Duane’s and sixth nerve ing binocular therapy in the form of dichoptic paresis. Modified Nishida procedure involves stimulation for amblyopia treatment in children. direct suturing of the recti muscles to the sclera Simple games have been developed which use a without any tenotomy or splitting of muscle, thus red green display with chromatically matched very useful in the treatment of sixth nerve palsy goggles. Birch et al.1 compared the dichoptic iPad and also missing medial rectus muscles. Medial gameplay with sham iPad gameplay in amblyopia transposition of split lateral rectus has also been treatment and found that the group given dichop- tried with success in cases of third nerve palsy.5 tic iPad games had significant visual gain 3 Childhood cataract accounts for 7.4–15.3% of months post-treatment. Although the randomized childhood blindness.6 Most who have operated controlled trial conducted by PEDIG2 favoured adult and paediatric cataracts would agree that patching, it did not establish that iPad therapy these patients cannot be treated as young adults. was substantially worse than patching. While Challenges and controversies abound right from we wait for more concrete results, we hope the deciding whether or not to operate to need for future of amblyopia treatment will be ‘No Patch, intraoperative skill, to postoperative management Only Play’! of complications. The technological advances have Strabismus is another disease entity we com- made cataract surgery in children faster and safer. monly encounter in our practice. The ultimate The availability of 23–25 gauge instruments, goal of treatment as a strabismologist is not just namely scissors, capsule forceps, and vitrectors, cosmesis, or good distance and near vision, but ensures safer surgery and well-maintained anter- good stereopsis. With advances in our knowledge ior chamber. Higher vitrectomy cut rates of up to of aetiologies and newer techniques of surgery, 4000/min and better fluidics in newer machines the outcomes are bound to improve. The technique have made vitrectomy safer in the youngest of Minimally Invasive Strabismus Surgery (MISS) patients. At the end of the procedure, the wounds is being employed to perform all types of strabis- can be left sutureless without fear of leak. The mus surgeries, namely rectus muscle recessions, Fugo’s plasma blade, which has been approved by resections, plications, reoperations, retroequatorial the US Food and Drug Administration, can be Sci J Med & Vis Res Foun October 2017 | volume XXXV | number 3 | 1 Guest Editorial used for capsulotomy, especially in cases of the understanding of strabismus aetiologies. Newer persistent foetal vasculature and posttraumatic imaging modalities such as high-resolution and fibrotic capsules. The newer advanced microscopes dynamic MRI aid better planning of strabismus include a rhexis assistant which is an intraopera- surgery. Management of nystagmus has come a tive projection of rings of custom sizes which can long way with the availability of video nystagmo- be used as guides for anterior and posterior capsu- graphy, and various drugs and surgical proce- lorhexis. The future certainly lies in the use of dures. We are fortunate to witness this era of femtosecond and Zepto surgery for anterior and innovation in paediatric ophthalmology. Even as posterior rhexis. Lin et al.7 have described a novel we say this, it is important that we, as ophthal- technique, in which children <2 years of age mologists, constantly update what we have learnt received lensectomy with an eccentric, smaller during our training and ensure we are aware of capsulorhexis leaving LECs intact. The residual various diagnostic and therapeutic options at our cells regenerated a lens structure with refractive disposal. power and accommodative ability. This must be studied in more eyes before it can be an adopted widely. References Genetics is an ever-evolving branch in medical 1. Birch EE, Li SL, Jost RM, et al. Binocular iPad treatment for science, it being no different in paediatric ophthal- amblyopia in preschool children. J AAPOS 2015;19:6–11. mology. The most researched disorder and its 2. Pediatric Eye Disease Investigator Group. Effect of a binocular genetic association in recent times has been iPad Game vs Part-time patching in children aged 5 to 12 years myopia. An Australian study8 came up with the with amblyopia: a randomized clinical trial. JAMA Ophthalmol 2016;134:1391–1400. conclusion that multiple genes on chromosome 5q 3. Mojon DS. Review: minimally invasive strabismus surgery. Eye are responsible for determinants of axial length (Lond) 2015;29:225–33. which ultimately determines myopia, while another 4. Leenheer RS, Wright KW. Mini‐plication to treat small‐angle 9 recent study found the gene locus for myopia strabismus: a minimally invasive procedure. J AAPOS being 15q14. Genetics has also helped us group 2012;16:327–30. together similar diseases which were diverse in 5.
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