Background: According to the toxoplasmic retinochoroiditis leading to loss of central vision, corneal opacity, tearing, photophobia, and is, therefore early treatment is very important. This study aimed to evaluate the efficacy of intravitreal injection of toxoplasmic retinochoroditis clindamycin in comparison with conventional therapy (oral drug) was performed.

Materials and Methods: In this clinical trial, target population was all patients with the toxoplasmic retinochoroiditis referred to clinics in ophthalmology Arak city, that stratified randomly into two groups, interventional group “A” was received treatment with intravitreal injection clindamaycin " and control group “B” was received standard oral treatment (Pyrimethamine and sulfadiazine and clindamaycin). Tool for data gathering was questionnaires and medical records of patients in which visual acuity based on the Senllene Chart and retinal thickness with use tomography layers of the retina (OCT). Results of measurement were recorded by specialist retina before and after intervention (weekly and monthly until complete resolution of lesions in retina) during one year. The data entered into the SPSS 16 software and after matching age &sex of patients, was final analysis the using descriptive and inferential tests such as t-test was performed.

Results: Of the 26 patients with toxoplasmic retinochoroditis, 16 (61.5%), urban and number 10 (38.5%) were rural. The average improvement in visual acuity between the two groups in mean time to lesion healing (A) and (B) was different. The visual acuity in before and after treatment (separation of treatment) was significant difference in both groups (p<0.05). Also central macular thickness (in patients with toxoplasmic retinochoroditis) between before and after treatment in each group was different (p= 0.001), but the changes mean central macular thickness (in cases of toxoplasmic retinochoroditis) There was no significant difference between treatments (p=0.452).

Conclusion: Although any two methods of treatment are effective, but intravitreal injection clindamaycin method due to shorter lesion healing time and increase higher visual acuity, is better than the alternative similar way .