Citation: Sabry D, El-Kannishy A, Kamel R, Abou Samra W. Correlation between en face optical coherence tomography defects of the inner retinal layers and ganglion cell inner plexiform layer analysis after internal limiting membrane peeling for idiopathic full-thickness macular hole.

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The aim of this study was to evaluate corneal clarity in keratoconic patients using corneal densitometry.Methods: comparing between corneal densitometry results among keratoconic patients and normal individual was measured over a 12 mm diameter area, divided the cornea to annular concentric zones and depths. Keratoconus was classified according to the topographic keratoconus classification, from March 2019 to March 2020 in Ophthalmic center Mansoura University, Egypt.Results: Group 1: 20 eyes diagnosed as manifest grade 1 keratoconus; Group 2: 20 eyes diagnosed as manifest grade 2 keratoconus; Group 3: 20 eyes diagnosed as manifest grade 3 keratoconus; Group 4: 20 eyes diagnosed as manifest grade 4 keratoconus; with 40 eyes normal topographic parameter a control group. There was a significant difference between keratoconous patients and control group regarding UCVA, BCVA, spherical refraction, cylindrical refraction and Pentacam parameters all ( P <0.05 ) . The study comparison between the studied groups regarding anterior (120 mm), central (from 120 mm to the last 60 mm) and posterior (last 60 mm) layers measurements showed increase in corneal densitometry reading in 0-2 mm, 2-6 mm, 6-10 mm, 10-12 mm anular zones in keratoconous patient and compared to control group, there was significantly increased in densitometry readings in keratoconous eyes and was related to keratoconous severity all (P <0.05). Conclusions:The densitometry readings increase in keratoconic eyes with higher values with increasing severity of keratoconus. So it is valuable diagnostic tool for diagnosting & following up the progression of the disease it represent data as corneal densitometry backscatter.

Study effect of unilateral primary pterygium on corneal endothelial cell density.Patients and Methods: a cross sectional observational comparative study was conducted on 30 patient with unilateral primary pterygium who were attended to Mansoura ophthalmic center on the period from September 2019 to September 2020 to assess corneal endothelial cell density, coefficient of variation, central corneal thickness using a non-contact specular microscopy. The contralateral eye served as a control.Results: Thirty patients were included in the study, 19 male (63.3%) and 11 female (36.7%). There was statistically significant reduction in the mean corneal endothelial cell density (cells/mm) in eyes with pterygium compared to control eyes (2423.10 ± 248.97 vs 2539 ± 256.39 respectively with p value < 0.001). With no statistically significant difference in coefficient variation and central corneal thickness in pterygium eyes and control eyes.Conclusion: pterygium eyes were associated with significant reduction in corneal endothelial cell density compared to contralateral control eyes.