TNOA Journal of Ophthalmic Science and Research

: 2020  |  Volume : 58  |  Issue : 3  |  Page : 224-

Dynamic tube of ahmed glaucoma valve implant

Premanand Chandran, Abhipsa Sahu, Ganesh V Raman 
 Department of Glaucoma, Aravind Eye Hospital, Coimbatore, Tamil Nadu, India

Correspondence Address:
Dr. Premanand Chandran
Aravind Eye Hospital, Avinashi Road, Coimbatore - 641 014, Tamil Nadu

How to cite this article:
Chandran P, Sahu A, Raman GV. Dynamic tube of ahmed glaucoma valve implant.TNOA J Ophthalmic Sci Res 2020;58:224-224

How to cite this URL:
Chandran P, Sahu A, Raman GV. Dynamic tube of ahmed glaucoma valve implant. TNOA J Ophthalmic Sci Res [serial online] 2020 [cited 2020 Oct 26 ];58:224-224
Available from:

Full Text

A 12-year-old girl with congenital glaucoma underwent trabeculotomy with trabeculectomy followed by Ahmed glaucoma valve implantation in the left eye. On examination, her best-corrected visual acuity was 6/24, and intraocular pressure was 19 mmHg on four antiglaucoma medications. Slit-lamp examination showed megalocornea with the deep anterior chamber, tube in superior quadrant at 1 o'clock, and clear lens. The dynamic movement of the tube was noticed with eye movement whose length in the anterior chamber varied from 2 mm in primary gaze [Figure 1]a to 4 mm in up gaze [Figure 1]b and 1 mm in down gaze [Figure 1]c. The fundus examination revealed 0.8:1 cup-to-disc ratio with the thin neuroretinal rim. The possible reason for this could be loosening of the nonabsorbable suture, extrusion of the suture securing the plate to the sclera and/or a stronger adhesion of the fibrous capsule around the plate to the fornix than to the sclera.[1],[2] The patient was on regular follow up without surgical intervention as there was no sight-threatening complication.{Figure 1}

Declaration of patient consent

The authors certify that they have obtained all appropriate patient consent forms. In the form the patient(s) has/have given his/her/their consent for his/her/their images and other clinical information to be reported in the journal. The patients understand that their names and initials will not be published and due efforts will be made to conceal their identity, but anonymity cannot be guaranteed.

Financial support and sponsorship


Conflicts of interest

There are no conflicts of interest.


1Law SK, Coleman AL, Caprioli J. Dynamic tube movement of Ahmed glaucoma valve. J Glaucoma 2009;18:628-31.
2Senthil S, Badakare A. Dynamic tube movement after reimplantation of Ahmed glaucoma valve in a child with glaucoma in aphakia. BMJ Case Rep 2014;2014:bcr2013203197.