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70th AIOC Proceedings, Cochin 2012In conclusion UBM evaluation in different room illuminations detected subtlefeatures of PDS/PG in 5 out of 6 eyes (83.33%)which did not have iris concavityor ILC in baseline conditions (normal room illuminations). Nd:YAG laseriridotomy was performed in 8 eyes, out of which normal iris configuration wasrestored in 6 (75%). Therefore conducting UBM in different room illuminationscan be of assistance in early diagnosis of PDS/PG and in deciding the LASERtreatment in PDS/PG to restore the normal iris configuration althoughprospective randomized studies are still required to prove this aspect.320REFERENCES1. Sugar HS. Pigmentary glaucoma: a 25-year review. Am J Ophthalmol 1966;62:499–507.2. Ritch R. Pigment dispersion syndrome. Am J Ophthalmol 1998;126:442–5.3. Migliazzo CV, Shaffer RN, Nykin R, et al. Long-term analysis of pigmentarydispersion syndrome and pigmentary glaucoma. Ophthalmology 1986;93:1528–36.4. Farrar SM, Shields MB,Miller KN, et al. Risk factors for the development andseverity of glaucoma in the pigment dispersion syndrome. Am J Ophthalmol1989;108:223–9.5. Siddiqui Y, Ten Hulzen RD, Cameron JD, et al. What is the risk of developingpigmentary glaucoma from pigment dispersion syndrome? Am J Ophthalmol 2003;135:794–9.6. P Mora, C Sangermani, S Ghirardini, A Carta, N Ungaro, SA Gandolfi; Ultrasoundbiomicroscopy and iris pigment dispersion: a case―control study; Br J Ophthalmol2010;94:428-32.7. Sokol J, Stegman Z, Liebmann JM, et al. Location of the iris insertion in pigmentdispersion syndrome. Ophthalmology 1996;103:289–93.8. Karickhoff JR. Reverse pupillary block in pigmentary glaucoma: follow up andnew developments. Ophthalmic Surg. 1993;24:562–3.9. Pavlin CJ, Harasiewicz K, Foster FS. Posterior iris bowing in pigmentary dispersionsyndrome caused by accommodation. Am J Ophthalmol. 1994;118;114–6.10. Strouthidis NG, Scott A, Peter NM, et al. Optic disc and visual field progressionin ocular hypertensive subjects: detection rate, specificity and agreement. InvestOphthalmol Vis Sci. 2006;47:2904–10.11. Potash SD, Tello C,Liebmann J, Ritch R. Ultrasound biomicroscopy in pigmentdispersion syndrome. Ophthalmology 1994;101:332–9.12. Karickhoff J R. Pigmentary dispersion syndrome and pigmentary glaucoma: anew mechanism concept, a new treatment and a new technique. Ophthalmic Surg.1992;23:269–77.13. Roberto G Carassa, Paolo Bettin, Marina Fiori, Rosario Brancato;Nd:YAG laseriridotomy in pigment dispersion syndrome: an ultrasound biomicroscopic study;Br J. Ophthalmol 1998;82:150-153 .