This clinical photograph captures a surgical step during Small Incision Cataract Surgery (SICS). The image shows an operative field of the human eye under surgical illumination. A metallic Simcoe cannula is inserted through a corneal-scleral tunnel incision into the anterior chamber. The cannula tip is positioned near the capsular opening, where it is being used to aspirate residual white lens cortex material. The posterior capsule is visible behind the iris, showing signs of a surgical opening. The surrounding conjunctiva and sclera exhibit expected surgical trauma, including minor subconjunctival hemorrhage and hyperemia from tissue manipulation. The cornea remains relatively transparent, providing a clear view of the intraocular structures and the irrigation-aspiration process. This visual demonstrates the essential technique of cortical cleanup to ensure a clear visual axis before intraocular lens (IOL) implantation in ophthalmological surgery.

This surgical diagram displays a surgeon's-eye view of a simulated Manual Small Incision Cataract Surgery (MSICS), specifically focusing on the creation of a scleral tunnel. The visual consists of two panels, A and B, rendered via a virtual reality simulator. In both frames, the eye is held open by a wire lid speculum, revealing the conjunctiva, vascularized sclera, a brown iris, and a centrally located lens. Panel A illustrates the tunnel dissection phase, where a crescent knife is utilized to create a lamellar pocket within the sclera. Panel B demonstrates the subsequent step of entering the anterior chamber; a keratome is shown penetrating the previously dissected tunnel into the eye, with a white circle highlighting the point of entry. The primary educational focus is the visualization of precise instrument angles and anatomical positioning required for successful scleral tunnel construction during cataract procedures.

This clinical photograph captures a surgical step during an ophthalmological procedure, likely Manual Small Incision Cataract Surgery (MSICS). The image demonstrates the stabilization of the globe using metallic toothed forceps applied to the superior sclera. A 'frown-shaped' scleral tunnel incision is visible, with surgical instruments being used to create or manage the tunnel architecture. The central eye feature is a mature cataract, characterized by a dense, opaque, milky-white crystalline lens visible through the pupil. The conjunctiva and episclera show mild surgical trauma and injection (redness) typical of the intraoperative phase. The educational focus of the image is on the technique of firm scleral fixation required to ensure a stable operative field during the construction of the incision. Key anatomical structures shown include the limbus, sclera, cornea, and the opacified lens. This material is relevant for ophthalmic surgical training and understanding cataract extraction techniques.

This clinical photograph captures a surgical field during an ophthalmic procedure, specifically the construction of a sclerocorneal tunnel incision for manual small incision cataract surgery (MSICS). The image shows the eye of a patient with a mature, white, opaque cataract visible through the dilated pupil. Surgical instruments are in active use: toothed forceps are seen stabilizing the sclera on the left, while a metal crescent knife is performing a partial-thickness lamellar dissection into the sclera near the limbus. The depth of the tunnel is being monitored by the visibility of the crescent blade through the overlying scleral fibers, a critical step to ensure a self-sealing wound and avoid perforation. The surrounding conjunctiva shows mild surgical hyperemia. This image serves as a teaching tool for ocular surgery, illustrating proper instrument positioning and tissue handling for creating the entry point into the anterior chamber during cataract extraction.