A photometric study of the effect of pupil dilatation on Nd:YAG laser iridotomy area.
نویسندگان
چکیده
A photometric study of the effect of pupil dilatation on Nd:YAG laser iridotomy area was performed in 21 eyes of 21 patients. The iridotomy area was 0.075 (0.055) mm-2 (mean (SD)) before pupil dilatation and 0.073 (0.070) mm-2 after pupil dilatation (t test NS). Iridotomy area after pupil dilatation correlated with iridotomy area before pupil dilatation (r = 0.815, p < 0.01) but did not significantly correlate with measures of iridotomy shape or position, or with changed iris area following pupil dilatation. Two iridotomies became reduced to less than 20% of their initial area following pupil dilatation. Our findings suggest that the only effective method of avoiding development of unacceptably small iridotomy area after pupil dilatation is to create a sufficiently large iridotomy at the time of initial laser surgery.
منابع مشابه
Magnetic resonance imaging signs may antedate visual loss in chiasmal radiation injury.
Comment. The treating physician called the laser manufacturer and was informed that the unit had been moved several days prior to the attempted treatment of this patient’s left eye. The laser had been left in the service mode so that the safety/standby feature was still disabled and the spontaneous discharge resulted in a pulse of 6.3 mJ through the pupil and thus resulted in the formation of a...
متن کاملبهکار گیری مدل های طولی در بررسی تاثیر یاگ لیزر ایریدوتومی محیطی بر روی سلول های اندوتلیوم قرنیه در بیماران مشکوک به گلوکوم زاویه بسته اولیه
Introduction: Primary angle closure glaucoma suspects is one of the common causes of blindness in the world and methods of treatment are associated with side effects such as loss of corneal endothelial cells. The purpose of this study was to investigate the effects YAG laser peripheral iridotomy on count and morphology of endothelial cells in patients with primary angle closure glaucoma suspect...
متن کاملEffect of Laser Irradiation on Bond Strength of Zirconia Ceramic to Self-Adhesive Resin Cement
Background and Aim: Bonding of zirconia to resin cement is challenging, and the zirconia surface requires surface treatment to yield an acceptable bond strength. This study aimed to evaluate the effect of different surface treatments on the bond strength of zirconia to a resin cement. Materials and Methods: In this in-vitro experimental study, 60 zirconia discs measuring 12 mm in diameter an...
متن کاملSequential argon-YAG laser iridotomies in dark irides.
Laser iridotomies in dark coloured irides are associated with higher complication and failure rates. A prospective clinical study to evaluate the use of the argon and Nd:YAG laser in sequential combination for iridotomy was carried out on 20 eyes of 13 patients with dark irides. Patent iridotomies were achieved in single treatment sessions for all the eyes. Iridotomy closure was observed in one...
متن کامل[The long-term effect of Nd:YAG laser iridotomy].
The IOP was controlled in 40 eyes (31 cases) of primary angle-closure glaucoma with Nd:YAG laser iridotomy. On follow-ups in 3 years, the differences in IOP, visual acuity, and the peripheral chamber depth from the preoperative values were very significant. The iridotomy hole closed spontaneously in 4 eyes. The success rates were 94% and 91% at 6 months and 2 years postoperative respectively, w...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- The British journal of ophthalmology
دوره 76 11 شماره
صفحات -
تاریخ انتشار 1992