50 year old highly diabetic patient with neovascularisation of the iris, dilated pupil. IOP is 45 mm. Visual field is much diminished. Before surgery I demonstrate the conjunctival lymphatics close to the limbus. For TCF, a conjunctival flap is made and tenon capsule is excised from the area of filtration.Transillumination helps in localisation of the anterior end of ciliary body. A gutter is made over the anterior ciliary body. The gutter is deepened through the ciliary body, till the posterior chamber is reached. The conjunctiva is sutured back. At the end of surgery, the anterior chamber is seen to be deeper than before. Luckily there is no bleeding from the iris. TCF deepens the AC in all cases.
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