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Inside‑out and outside‑in: Tips and tricks in posterior lenticonus Goura Chattannavar, Ramesh Kekunnaya1 Consultant, Child Sight Institute, Jasti V. Ramanamma Children’s Eye Care Centre, L. V. Prasad Eye Institute, Hyderabad, Telangana, 2Director, Child Sight Institute and Centre for Technology Innovation, L. V. Prasad Eye Institute, Hyderabad, Telangana, India Correspondence to: Dr. Ramesh Kekunnaya, Director, Child Sight Institute and Centre for Technology Innovation, Head, Child Sight Institute and Jasti V. Ramanamma Children’s Eye Care Centre, L. V. Prasad Eye Institute, L. V. Prasad Eye Institute, KAR Campus, Hyderabad, Telangana, India. E‑mail: [email protected]; [email protected] Background: Posterior lenticonus is a congenital condition characterized by the thinning and bowing of posterior lenticular capsule. Cataract develops when normal intra‑lenticular pressure bulges the posterior capsule at the circumscribed portion of inherent thin posterior lens capsule, leading to derangement of lamellar lens fibers. This condition poses a surgical challenge as the presentation varies from thin, bulging posterior capsule to large, pre‑existing posterior capsular dehiscence. Purpose: This video highlights the tips for the surgical management of various scenarios of posterior lenticonus. Synopsis: In this video, tips for surgical management of various scenarios of posterior lenticonus are illustrated. Intraoperatively, ruptured posterior capsule is suspected by the presence of a fish‑tail sign. The anterior capsulotomy is relatively easier in a flatter anterior lens capsule, owing to reduced intra‑lenticular pressure. Hydro‑dissection is avoided to prevent extension of pre‑existing posterior capsular dehiscence or creation of rupture in a thinned‑out capsule. The peripheral lens cortex aspiration is initiated first, followed by in each quadrant. In a presence of ruptured posterior capsule by vigilant inspection at this stage, the surgeon should change the direction of lens matter aspiration by aspirating the central lenticular matter first, followed by peripheral cortex like “inside‑out”. In absence of posterior capsule dehiscence, peripheral cortex is aspirated first, followed by central lens matter aspiration like “outside‑in”. Adequate anterior vitrectomy is performed until there are no vitreous tags. Highlights: In the presence of pre‑existing posterior capsular defect, the lens matter is aspirated from the center (inside‑out), whereas in the absence of capsular defect, the lens matter is aspirated from the periphery (outside‑in). Key words: Cataract surgery, posterior lenticonus, surgical techniques Doi: 10.4103/ijo.IJO_903_22