Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/10399
Title: Corneal Topographic Changes in Patients with Vernal Keratoconjunctivitis
Authors: Nihal Mohammed
Madiha Sid Ahmed
Keywords: Topographic
Keratoconjunctivitis
vemal keratoconjunctivitis
Issue Date: 16-Jan-2017
Publisher: جامعة النيلين - كلية الدراسات العليا
Abstract: Abstract Aim: The study aimed to estimate the comeal topographic changes in patients with vemal keratoconjunctivitis. This is a case control study conducted in Khartoum state at Makkha Eye Complex and Al-Fisal Eye Center in the period from March to August 2015. Material and Methods: The history of subjects was taken to be sure that the subjects have no history of systemic and ocular diseases. Vision and refraction were tested using (Topcon CP-5D, Japan) projected chart and (Topcon KR-800, Japan) Autorefractometer respectively. (Topcon SL-D7, Japan) slit lamp biomicroscope was used to examine the anterior segments of the eye for the presence of VKC and to detect the type of disease. (ATLAS 900 — ZEISS, Germany) corneal topographer was used to measure the following: anterior corneal curvature (K-reading), toric comeal measurement, corneal asphericity and central corneal irregularity. These measurements were taken for a two groups; VKC group (study group), and normal subjects (control group). A total number of 80 patients (160 eyes) were found to fulfill the criteria of selection by using of a special designed data fonn. Results: A total of 55 males and 25 females of ages ranged from 6 to 19 years with a mean of (13.07 i 3.19 years) were found eligible to be studied. Fifiy three percent of subjects in the study group have a vision of less than 6/ l8,while the worst vision in control group was 6/18, P < 0.001. Around 80% of subjects with VKC had astigmatism compared to 20% in the control group. Topographic analysis of anterior corneal surface show that Keratometric readings in VKC group was high and showed a significant difference with a mean of 52.03 d:9.06 D and 50.33 1 6.78 D for K1 and K2 respectively, while K1 and K2 were 43.29 5: 1.50 D and 41.48 :l:1.44 D in control group, P < 0.001. Toric comeal measurement also showed a significant difference with a mean of 53.25 =\: 9.65 D in study group versus 43.45 i 1.57 D in control group, P < 0.001. The corneal asphericity analysis was significantly different and revealed a mean of -0.95 i 0.41 in study group compared to -0.48 :1: 0.19 in control group, P S 0.001. The comeal irregularity measurement showed a significant difference with a mean of 3.44 i 2.59 mp in study group compared to 1.06 =l:0.59 mu in control group, P 5 0.001._53.3% of patients in the study group have mild keratoconus, 26.7% were normal, 16.71% suspect keratoconus, and only 8.3% have advance keratoconus. Conclusion: Subjects with VKC have more abnormal corneal topographic pattems than normal subjects and were more susceptible to keratocouns. Keywords: Vemal keratoconjunctivitis, Comeal topography, Keratometer readings, Toric comeal measurement, Comeal asphericty, Comeal irregularity measurement.
Description: مؤتمر
URI: http://hdl.handle.net/123456789/10399
Appears in Collections:مؤتمر الدراسات العليا السنوي 08

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