Bhavesh Govindbhai Mer1 , Kiran Chandubhai Patel2 , Abhishek Hiteshbhai Shah3 , Parth Dineshbhai Suthar4 , Somesh Ved Parkash Aggarwal5
BACKGROUND Myopia affects a significant proportion of population, particularly in the Asian countries. When the dioptric power of the eye is more than -6 diopters it is known as high myopia or pathological myopia. Only few studies have evaluated possible structural changes in the retina in individuals with high myopia without clinically overt retinal disease. With the new modalities like optical coherence tomography it is possible now to study the microscopic anatomy in detail. Moreover, it is an outdoor non-invasive procedure. A basic understanding of colour coding of normative data in programme macular cube and disc cube is a must. METHODS This study was carried out on 74 patients (148 eyes) with high myopia (≥-6.00 D) who had undergone OCT scan during the period from Dec 2017 To Nov 2018 at Baroda Medical College. All the patients were included on the basis of their diopteric power and all the patients having any local or systematic comorbidity were excluded. All the patients having history of any eye surgery or any intervention in the globe e.g. intra vitreal injection or Lasik surgery were excluded. RESULTS Out of 148 eyes of all patients all had high myopia in diopters from -6 to <-7 with following data. Total 10 (13.15%) eyes & 28 (36.84%) eyes were detected in yellow zone of ILM RPE thickness average & average RNFL thickness respectively. Out of 148 eyes 30 eyes had high myopia in diopters from -7 to <-8 with following data. Total 10 (33.33%) eyes were detected in yellow zone of average RNFL thickness. Which suggests, with increase in diopters of myopia, macular & RNFL thickness starts to decrease as well. Our study results were consistent with the study from Korea which is considered to be a landmark study. CONCLUSIONS With increase in diopters of myopia macular and RNFL thickness starts decreasing. So, in a nutshell, OCT is a very important tool in screening the high myopic patients and seeing the structural changes before their clinical signs appear.
