This issue at a glance
Author(s):
Abstract:
In this issue of JOCO, Moghimi et al present “Qualitative evaluation of anterior segment in angle closure disease using anterior segment optical coherence tomography”. In this prospective, cross-sectional study, one eye of 115 patients with angle closure disease was evaluated using anterior segment optical coherence tomography (AS-OCT). The patients were divided into three subgroups: fellow eye of acute angle closure (FAAC), primary angle closure glaucoma (PACG), and primary angle closure suspect (PAGS). They found a significant difference in the mechanism of this event in the three subgroups (p = 0.03). While the majority of FAAC and of PACS eyes had dominantly pupillary block mechanism in the PACG group, this phenomena was observed in only 48.7% of cases (p = 0.03). The percentage of exaggerated lens vault and plateau iris was higher in PACG group. FAAC group had the shallowest AC and greater iris curvature and lens vault which were statistically significant compared with the two other groups. The iris thickness was not significantly different in the three groups. They concluded that pupillary block was a major factor in the mechanism of primary acute angle closure glaucoma. Primary angle closure glaucoma is the most frequent cause of blindness in the world1; therefore, AS-OCT imaging can indicate which eyes should be treated before angle closure occurs.
In the prospective, non-randomized, comparative case series, Tanbakouee and coworkers have presented their investigation “Photorefractive keratectomy for patients with preoperative low Schirmer test value”. They have compared lacrimal secretion with preoperative low and normal Schirmer cases after photorefractive keratectomy (PRK). The patients were divided in two groups. 36 eyes of 36 patients with low Schirmer test were compared with 40 eyes of 40 patients with normal Schirmer test. Post-operatively, the Schirmer values were significantly lower in both groups. However, deterioration was much greater in low Schirmer group (p = 0.012). The mechanisms for the post-PRK dryness can be multifactorial, but corneal sensory nerve damage could play a major role.2 The authors propose that the patients with dry eye should be thoroughly assessed and treated before PRK.
Zhang and coauthors present “Corneal biomechanics after small-incision lenticule extraction versus Q-value-guided femtosecond laser-assisted in situ keratomileusis”. Their aim was to study the changes in corneal hysteresis and corneal resistance factors following small-incision lenticule extraction (SMILE) versus Q-value-guided femtosecond laser assisted in situ keratomileusis (Q-FS-LASIK). They included 80 eyes of 80 patients in each group. Corneal resistance factors were quantitatively assessed using Ocular Response Analyzer prior to operation and at 1 day, 2 weeks, and 1 and 3 months post-operatively. Both types of surgery were associated with statistically significant decrease in corneal biomechanical properties at day 1 (post-operative) p
Language:
English
Published:
Journal of Current Ophthalmology, Volume:28 Issue: 4, Dec 2016
Pages:
163 to 164
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