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Methods: Primary angle-closure glaucoma was defined as the presence of glaucomatous optic neuropathy and compatible visual field loss associated with a closed angle in the same eye. All study eyes underwent laser peripheral iridotomy (LPI). There were two groups of patients studied. Group A consisted of those with a past documented history of an episode of acute angle closure (that had resolved after LPI). Group B consisted of those with no previous acute episode. The presenting features, management, and subsequent long-term intraocular pressure (IOP) outcome were analyzed.

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Participants: Sixty-five consecutive patients who were diagnosed with PACG at one Singapore hospital from January 1990 through December 1994.

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Purpose: To study the long-term clinical course of patients with primary angle-closure glaucoma (PACG).

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Conclusions: Despite the presence of a patent LPI, most eyes with established PACG require further treatment to control IOP. Medical therapy fails in most cases, necessitating filtering surgery. Patients risk experiencing further glaucomatous visual damage if this trend is not detected.

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The Taco Setpoint iSeries-S Mixing Valves are used instead of thermostatic mixing valves for precise dial-in supply water temperature control to a heating system. The direct drive microprocessor-based actuator modulates a 2-way, 3-way or 4-way valve to inject different rates of hot water into the cooler system return water. In combination with the optional boiler protection sensor, the iSeries valves provide the unique benefit of optimal temperature control with boiler protection. The setpoint temperature is adjustable from 80ºF to 180ºF using a dial located on top of the actuator. A 15ºF setback of the supply water can be initiated for additional unoccupied or nighttime setback control. An external multi-status LED indicator light, plug-in wiring connections and an easy to remove actuator makes installation and diagnostics a snap.

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The Taco I100T4S-1 is a 1 inch, 4-way setpoint I-Series Mixing Valve that provides precise and cost-effective temperature control for your heating systems, the flexibility of zone-to-zone control, plus built-in protection against boiler flue gas condensation. Available in 2-way, 3-way or 4-way injection configurations, for either outdoor reset control or fixed water supply temperature applications, and operate off constant power or relay end switch. Features include a ball valve design, High Cv, manual operation button, solid-state microprocessor, multi-status LED indicator light and easy, one-hand actuator removal.

Results: The follow-up period was 63 +/- 29 months (mean +/- standard deviation). The mean presenting IOP was 40 +/- 16 mmHg, and the presenting vertical cup-to-disc ratio was 0.6 +/- 0.2. Of the 83 eyes, only five eyes (6%) did not require any treatment after LPI in the long term. In group A (35 eyes), all eyes required further treatment with antiglaucoma medications. Twenty-two eyes (62. 9%) eventually underwent filtering surgery at a mean of 7.3 months after the commencement of treatment. In group B (48 eyes), 43 eyes (89.6%) underwent further medical therapy, of which 22 eyes (45.8%) eventually underwent filtering surgery at a mean of 18.4 months after the commencement of treatment.