Relationship of inferior oblique overaction to macular and subfoveal choroidal thickness.
OBJECTIVE
To evaluate the macular and subfoveal choroidal thickness of eyes with inferior oblique muscle overaction (IOOA) using enhanced depth imaging spectral domain optical coherence tomography (EDI SD-OCT).


METHODS
The measurements of macular and subfoveal choroidal thickness obtained by EDI SD-OCT of patients with IOOA (24 patients) were compared with those of age- and sex-matched controls (25 subjects).


RESULTS
There were no morphological abnormalities of the macula in patients with IOOA or in control subjects. There were no statistically significant differences in macular and subfoveal choroidal thickness between the eyes with IOOA and the eyes of the control subjects (P > 0.05). When the patients with IOOA were assigned to two distinct groups according to the degree of IOOA, the macular thickness did not differ between groups (P = 0.66), whereas subfoveal choroidal thickness measures were significantly lower in eyes with severe IOOA compared to eyes of the controls (P = 0.01).


CONCLUSIONS
IOOA has no effect on the morphology and the thickness of the macula. Severe IOOA seems to be related to thinning of subfoveal choroid due to possible external mechanical effect.
Department of Ophthalmology, Canakkale Onsekiz Mart University School of Medicine, Canakkale, Turkey. Electronic address: isersan@gmail.com.
Ismail
I
Ersan
Department of Ophthalmology, Necmettin Erbakan University School of Medicine, Konya, Turkey.
Refik
R
Oltulu
Department of Ophthalmology, Necmettin Erbakan University School of Medicine, Konya, Turkey.
Orhan
O
Altunkaya
Department of Ophthalmology, Necmettin Erbakan University School of Medicine, Konya, Turkey.
Gunhal
G
Satirtav
Department of Ophthalmology, Canakkale Onsekiz Mart University School of Medicine, Canakkale, Turkey.
Sedat
S
Arikan
Department of Ophthalmology, Mus State Hospital, Mus, Turkey.
Meryem
M
Donbaloglu
Department of Ophthalmology, Necmettin Erbakan University School of Medicine, Konya, Turkey.
Ahmet
A
Ozkagnici
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002829:Choroid / Q000033:anatomy & histology*; D004948:Esotropia / Q000473:pathology* / Q000601:surgery; D005260:Female; D005584:Fovea Centralis; D006801:Humans; D008266:Macula Lutea / Q000033:anatomy & histology*; D008297:Male; D009801:Oculomotor Muscles / Q000473:pathology* / Q000601:surgery; D013508:Ophthalmologic Surgical Procedures; D009929:Organ Size; D011446:Prospective Studies; D041623:Tomography, Optical Coherence