Semi-automated quantitative analysis of the middle limiting membrane in tubercular serpiginous-like choroiditis using swept-source optical coherence tomography.

To analyze the longitudinal changes in the outer plexiform layer (OPL) in patients with tubercular serpiginous-like choroiditis (TB SLC) and compare it to the healthy control population. Clinical and imaging data of subjects with TB SLC (minimum 6-month follow-up) and healthy control subjects were reviewed. Optical coherence tomography (OCT) imaging obtained using swept-source device (DRI Triton, Topcon, Japan) from three visits (baseline, 3 months, and 6 months) were analyzed. Three OCT scans were chosen-one passing through the center of the fovea, one line above, and one line below. After random indexing to anonymize the images, they were pre-processed and fed into an automated pipeline to identify, crop, and measure the area of the OPL in the line scan. Longitudinal comparisons of OPL within the patient group were performed. The study included 32 eyes (16 patients; 11 males; mean age: 32.9 ± 7.8 years) with TB SLC. Twenty-eight eyes (14 subjects; 10 males: mean age: 31.1 ± 6.2 years) of healthy control subjects (age- and gender-matched) were also selected. The area of OPL was significantly different between the baseline and month 6 visit (6288 ± 1803 versus 5487 ± 1461; p = 0.0002) at the central scan passing through the fovea. For the scans above and below the fovea, the reduction in OPL area was significant at each visit (p < 0.0001). In comparison with healthy control subjects, OPL area values in patients with TB SLC were significantly lower at the month-3 (6116 ± 1441 versus 7136 ± 2539; p = 0.04) and the 6-month visit (5487 ± 1461 versus 7136 ± 2539; p < 0.001). The atrophied OPL at month 6 has been referred to as the "middle limiting membrane" (MLM). Subjects with TB SLC may develop progressive atrophy of the OPL resulting in formation of MLM, which is seen as a hyper-reflective line replacing the OPL. The analysis of longitudinal changes in the OPL may be useful in predicting anatomical and functional outcomes in these patients.

LONGITUDINAL FOLLOW-UP OF TUBERCULAR SERPIGINOUS-LIKE CHOROIDITIS USING OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY.

PURPOSE: To analyze and describe serial follow-up of choriocapillaris alterations in tubercular serpiginouslike choroiditis (SLC) using optical coherence tomography angiography (OCTA) and to compare it with multimodal imaging. METHODS: In this prospective cohort study, patients with active tubercular SLC underwent OCTA using Optovue RTVue XR Avanti and other imaging techniques including enhanced-depth imaging OCT (EDI-OCT) (Heidelberg Spectralis; Heidelberg Engineering, Heidelberg, Germany), fundus autofluorescence, fluorescein angiography, and indocyanine green angiography. Serial imaging was performed for a total follow-up of 3 months. Choriocapillaris alterations at the site of lesions were analyzed on OCTA imaging, and their mean lesion areas were calculated. RESULTS: Twenty-six eyes (26 patients; 20 males; mean age: 32.68 ± 10.56 years) were included. Fourteen eyes had active multifocal lesions (n = 39), whereas 12 eyes had active placoid lesions (n = 12). At baseline, OCTA showed hyporeflective flow deficit lesions corresponding to the hypofluorescent lesions on indocyanine green angiography in all eyes. In the multifocal type of SLC, the mean lesion area decreased in all eyes compared with baseline, and lesions with a lesion area less than 0.1 mm2 on OCTA showed near-complete resolution with minimal choriocapillaris atrophy. In comparison, all eyes with a placoid type of SLC showed no significant reduction in the lesion area and showed extensive choriocapillaris atrophy. CONCLUSION: Optical coherence tomography angiography has the unique ability to demonstrate pathological flow impairment at the level of choriocapillaris in active tubercular SLC. Serial OCTA analysis reveals that large tubercular SLC lesions result in choriocapillaris atrophy as the lesions heal, whereas smaller multifocal lesions show resolution of choriocapillaris hypoperfusion with minimal atrophy.

Cytopathology and Polymerase Chain Reaction of Vitreous Fluid in Tubercular Intermediate Uveitis.

Purpose: Cytopathology of vitreous is most commonly done to diagnose vitreoretinal lymphoma in eyes with nonspecific inflammation. Vitreous cytopathology features of tuberculous intermediate uveitis have not been described in literature.Case report: We report a case of a healthy 35-year-old female who showed granulomatous inflammatory changes on vitreous cytopathology with polymerase chain reaction confirming a diagnosis of intraocular tuberculosis.Conclusion: This case highlights the role of cytopathology in determining the etiology and pathogenesis behind the elusive diagnosis of intermediate uveitis. Polymerase chain reaction can further help in confirming the diagnosis and allowing commencement of appropriate therapy.

The Use of Optical Coherence Tomography Angiography in the Diagnosis of Inflammatory Type 1 Choroidal Neovascularization Secondary to Tuberculosis: A Case Report.

Purpose: To report a case of choroidal neovascularization (CNV), which was not obvious with dye angiography but was detected with optical coherence tomography angiography (OCTA).Methods: A 50-year-old female presented with decreased vision in her right eye. Funduscopic examination revealed a swollen hyperemic disc, peripapillary exudation, and choroidal infiltration.Results: Optical coherence tomography revealed intraretinal cysts, subretinal fluid in the macular region, and subretinal hyperreflective material in the papillomacular area. Fluorescein angiography revealed early hypofluorescence in the areas of choroidal infiltrations, and indocyanine green angiography (ICGA) also showed hypocyanescence corresponding to these infiltrations and revealed a faint hypocyanescence in the papillomacular region, further corresponding to the subretinal hyperreflective material on OCT scan. Two weeks after the initiation of systemic therapy with the diagnosis of tuberculosis, OCTA scans detected Type 1 CNV in the peripapillary area.Conclusion: OCTA may be superior to ICGA in the detection of CNV secondary to inflammatory situations.

A Long-Term Follow-up of Retinal Vasculitis - Do They Develop Systemic Disease?

Purpose: To study systemic association and relapses in a long-term follow-up of primary retinal vasculitis (PRV) and possible tubercular vasculitis (PTV) cases. Method: Retrospective, descriptive chart review of patients diagnosed as PRV and PTV with ≥1-year follow-up. Clinical presentation, systemic association, morphology of vasculitis, relapses, and treatment were noted. Results: 123 eyes of 76 patients were studied. Occlusive (n = 97), exudative (n = 16), combined (n = 10) and focal (n = 7) vasculitis were seen. Vitreous hemorrhage at presentation was noted in 27% eyes (n = 33). Four patients (3.25%) developed systemic disease during follow-up (2 psoriasis, 1 Systemic Lupus Erythematosus, 1 ulcerative colitis). Mean number of cases with relapses were 45 (59.21%). Number of cases with relapses in PRV and PTV were 20 (66.66%) and 16 (66.66%), respectively. (p = 1) Conclusion: Systemic disease attributed to vasculitis can rarely develop during follow up of PRV and PTV patients. Relapses remain almost same in PTV and PRV.

Clinical Profile and Treatment Response of Patients with Ocular Inflammation due to Presumed Ocular Tuberculosis: A Retrospective Study

Objectives: Ocular tuberculosis is an extrapulmonary tuberculous infection and has varying manifestations which pose a huge challenge to diagnosis and treatment. The purpose of this study is to describe the various clinical manifestations of ocular inflammations due to tuberculosis and to assess the response to treatment following antituberculous therapy (ATT) and corticosteroids in these patients. Materials and Methods: We performed a retrospective analysis of 29 patients with presumed ocular tuberculosis who were started on ATT and completed follow-up of at least 6 months after ATT was initiated. The data collected were: age at presentation, sex, laterality, presence or absence of pulmonary/extrapulmonary tuberculosis, history of exposure to tuberculosis, site of ocular involvement and duration of illness, visual acuity at presentation and at 6-month follow-up, and response to treatment. Results: Most of the patients were of economically productive age, between 21-60 years. This most common presentation in our study population was unilateral nongranulomatous anterior uveitis. In spite of the delay between symptom onset and start of therapy, favorable response was noted in 79.3% of patients at completion of 6 months of ATT. The various reasons for the delay in start of therapy were also evaluated. Conclusion: In this case series, we presented the various ocular manifestations and the difficulties faced in the diagnosis of presumed ocular tuberculosis. Outcomes of ATT were favorable in most of our patients. Thus, the clinician should exercise a very high degree of suspicion and should not withhold a trial of ATT.

Imagen multimodal en uveítis tuberculosa / Multimodal imaging in tubercular uveitis

No disponible

The impact of ocular tuberculosis on vision after two months of intensive therapy

ABSTRACT Tuberculosis is an infectious disease of global importance with major economic and social burden accounting for 25% of all avoidable deaths in developing countries. Extrapulmonary involvement may occur either in association with clinically apparent pulmonary tuberculosis or in isolation. This cross-sectional descriptive study aimed to evaluate the impact of ocular tuberculosis in visual acuity at baseline and after two months of intensive anti-tuberculous therapy. A sample of 133 pulmonary tuberculosis patients, seven disseminated tuberculosis, and three pleural tuberculosis patients was evaluated. All patients underwent routine ophthalmic evaluation, including assessment of visual acuity, biomicroscopy, applanation tonometry, indirect ophthalmoscopy, and fluorescent angiography as appropriate. None of the patients had impaired visual acuity due to tuberculosis. A rate of 4.2% (6/143) of ocular involvement was found. None of the patients with ocular involvement were HIV-infected. Of the six patients with ocular involvement, five met the diagnostic criteria for probable and one for possible ocular lesions. As for the type of ocular lesions, two patients had bilateral findings: one had sclerouveitis and the second had choroidal nodules. The other four patients presented with unilateral lesions: peripheral retinal artery occlusion in the right eye (one case), choroidal nodules in the left eye (one case), and choroidal nodules in the right eye (two cases). Patients progressed favorably after two month of intensive therapy, with no significant reduction in vision.

Immune stromal keratitis: a rare ocular presentation of tuberculosis.

An 11-year-old female patient presented with diminution of vision in both the eyes for the last 4 days. She had redness, watering and photophobia for the past 11 days. Slit lamp examination revealed multiple disc-shaped corneal stromal infiltrates with an overlying epithelial defect and hypopyon in both the eyes. A provisional diagnosis of infective keratitis was made. The patient was started on empirical antimicrobial therapy. However, no improvement was noted over the next 72 hours. Microbiological examination of the corneal scraping from both the eyes was negative. Considering the above, provisional diagnosis was changed to immune stromal keratouveitis and the patient was started on topical steroids. Further evaluation revealed a positive Mantoux test (30×20 mm) and contrast enhanced CT chest showing pulmonary nodules, suggestive of tuberculosis. The patient was subsequently started on antitubercular treatment. The infiltrates along with the ulcer and anterior uveitis responded dramatically to the revised treatment and resolved completely within 7 days of therapy.

The impact of ocular tuberculosis on vision after two months of intensive therapy.

Tuberculosis is an infectious disease of global importance with major economic and social burden accounting for 25% of all avoidable deaths in developing countries. Extrapulmonary involvement may occur either in association with clinically apparent pulmonary tuberculosis or in isolation. This cross-sectional descriptive study aimed to evaluate the impact of ocular tuberculosis in visual acuity at baseline and after two months of intensive anti-tuberculous therapy. A sample of 133 pulmonary tuberculosis patients, seven disseminated tuberculosis, and three pleural tuberculosis patients was evaluated. All patients underwent routine ophthalmic evaluation, including assessment of visual acuity, biomicroscopy, applanation tonometry, indirect ophthalmoscopy, and fluorescent angiography as appropriate. None of the patients had impaired visual acuity due to tuberculosis. A rate of 4.2% (6/143) of ocular involvement was found. None of the patients with ocular involvement were HIV-infected. Of the six patients with ocular involvement, five met the diagnostic criteria for probable and one for possible ocular lesions. As for the type of ocular lesions, two patients had bilateral findings: one had sclerouveitis and the second had choroidal nodules. The other four patients presented with unilateral lesions: peripheral retinal artery occlusion in the right eye (one case), choroidal nodules in the left eye (one case), and choroidal nodules in the right eye (two cases). Patients progressed favorably after two month of intensive therapy, with no significant reduction in vision.

Review of people with retinal vasculitis and positive QuantiFERON®-TB Gold test in an area nonendemic for tuberculosis.

PURPOSE: To assess the frequency of a positive QuantiFERON®-TB Gold test (quantiferon) among patients with retinal vasculitis in an area nonendemic for tuberculosis (TB); to review clinical characteristics and management of affected individuals. METHODS: Consecutive patients with retinal vasculitis and a positive quantiferon were retrospectively analyzed. Demographics, clinical data, laboratory, imaging findings, and therapy were evaluated. RESULTS: Among 49 patients with retinal vasculitis, 12 (24%) had a positive quantiferon. Median age was 37 years, there were five female patients. Five individuals (42%) had previously lived in a country endemic for TB. Retinal vasculitis was occlusive in six patients (50%). On chest imaging, pulmonary tuberculosis was suspected in one patient (8.3%). Treatment modalities included full antitubercular treatment (n = 1), isoniazid prophylaxis (n = 6), systemic corticosteroids (n = 8), and laser treatment (n = 5). After a median follow-up of 27.5 months, inflammation was inactive (n = 6) or recurrently present (n = 6). No patient lost ≥ 2 lines of best-corrected visual acuity during follow-up. CONCLUSIONS: The quantiferon test is recommended in the evaluation of people with retinal vasculitis. Interpretation of a positive result can be challenging in a country nonendemic for TB. The majority of patients with quantiferon-positive retinal vasculitis were found to have latent TB.

Rare presentation of intractable tuberculous panophthalmitis with intraocular and intraorbital abscesses: a case report.

BACKGROUND: We report a rare presentation of extrapulmonary tuberculosis. CASE PRESENTATION: A 29-year-old Burmese woman with human immunodeficiency virus infection and known pulmonary tuberculosis who had been treated for 5 months presented to our hospital with unilateral progressive painful visual loss of 1 month's duration. She was diagnosed with tuberculous panophthalmitis with subretinal and intraorbital abscesses, conjunctival abscess, and extraocular muscle tuberculoma. The diagnosis was confirmed by a conjunctival pus swab with a positive result for acid-fast bacilli and a positive result for a mycobacterial culture. There was high suspicion of multidrug-resistant tuberculosis. Despite receiving ongoing aggressive treatment with conventional antituberculous medications, this patient required subtotal orbital exenteration to control her infection and prevent further progression. Second-line antituberculous medications were added to the first-line therapy, with satisfactory results achieved. CONCLUSIONS: Tuberculous panophthalmitis with intraocular and intraorbital abscesses is a rare presentation of extrapulmonary tuberculosis. Patients who do not respond to first-line antituberculous therapy might be infected with either single-drug or multidrug-resistant Mycobacterium tuberculosis. Patient compliance is one of the key factors that can alter the course of treatment. Careful patient monitoring can improve disease progression, outcome, and prognosis.

[Ocular tuberculosis]. / Tuberkulez glaz.

Ocular tuberculosis (OTB) is a specific infectious (bacterial) disease dealt with by ophthalmologists and phthisiatricians. This is a serious illness with chronic, persistent course and extremely doubtful prognosis. Chemotherapy, even if effective, can still be followed by a decrease in visual acuity. Clinical recovery is often unstable. Ocular tuberculosis is largely associated with permanent disability and, as a result, a decline in quality of life of these patients. Statistical reporting does not always reflect the true prevalence of the disease as it sometimes develops in patients with pre-existing specific pulmonary involvement. This article discusses all pathogenetic mechanisms of OTB that have been described so far. Attention is paid to modern diagnostic methods, including spectral optical coherence tomography. Positive results of endonasal electrophoresis for the treatment of OTB are described.

Mycobacterial ocular inflammation: delay in diagnosis and other factors impacting morbidity.

IMPORTANCE: The reported outcomes of ocular mycobacterial infection are commonly unfavorable. This study is among the first to elucidate factors associated with poor outcomes, as well as highlight the continued controversies in therapy, particularly the role of oral corticosteroids. OBJECTIVE: To describe presentations and outcomes of mycobacterial ocular disease in the Midwestern United States. DESIGN Retrospective case series. SETTING: A university-based uveitis clinic. PARTICIPANTS: Twenty-six eyes of 17 patients with mycobacterial ocular inflammatory disease seen at University of Illinois at Chicago from 1995 to 2010. MAIN OUTCOME MEASURES: Bivariate and regression analyses were performed to assess factors associated with delay in referral, relapse, and irreversible visual acuity loss (≤ 20/200). RESULTS: Of 17 patients, 13 had isolated ocular disease, 1 had miliary tuberculosis (TB), 2 had TB lymphadenopathy, and 1 had active pulmonary TB. Fourteen had Mycobacterium tuberculosis and 3 had nontuberculous mycobacterial infection. Chest imaging was consistent with granulomatous disease in 46.7%. Average delay from ocular disease onset to uveitis service referral was 755.3 days. Posterior uveitis and non-Hispanic white race were associated with increased delay. A relapsing course was observed in posterior uveitis (odds ratio [OR], 20.0; 95% CI, 1.39-287; P = .03) and those treated with systemic steroids for eye disease (OR, 10.1; 95% CI,1.60-64.0; P = .01). Disease control was achieved in 81%, although 38.5% had profound visual loss, associated with age older than 50 years and delay in diagnosis. Patients diagnosed after 500 days from initial ocular symptoms were more likely to lose vision (OR, 20.0; 95% CI, 1.41-282; P = .03). CONCLUSIONS: Ocular mycobacterial infection occurs in nonendemic areas and cannot be ruled out with negative chest imaging. Tuberculosis and atypical mycobacterial infection should be in the differential diagnosis of ocular inflammation, regardless of patient ethnicity. Significant delays exist in instituting antimicrobial treatment, associated with increased morbidity. Early referral is necessary for patients not responding appropriately to anti-inflammatory therapy.

Tubercular serpiginous-like choroiditis presenting as multifocal serpiginoid choroiditis.

PURPOSE: To describe the clinical features, course, and outcome in tubercular serpiginous-like choroiditis. DESIGN: Retrospective cohort study. PARTICIPANTS: A total of 105 patients (141 eyes) between May 2002 and July 2010. METHODS: Patients had the following inclusion criteria: (1) complete clinical records and digital fundus images at baseline and follow-up visits, (2) positive tuberculin skin test or QuantiFERON-TB Gold (Cellestis International Pty Ltd. Chadstone, Victoria, Australia) test result, (3) active serpiginous-like choroiditis in at least 1 eye, (4) all known causes of infectious (except tuberculosis) and noninfectious uveitis ruled out, and (5) a minimum of 9 months of follow-up from initiation of treatment that included antitubercular therapy (ATT) with oral corticosteroids (93 patients) or corticosteroids alone (12 patients). MAIN OUTCOME MEASURES: Clinical characteristics and evolution of choroiditis lesions from the acute to healed stage, recurrence, visual outcome, and complications. RESULTS: Mean age was 33 ± 9.3 years (range, 12-54 years; 75 male and 30 female patients). Serpiginous-like choroiditis was bilateral (at least 1 eye active) in 66 patients (62.9%). Of 171 affected eyes, 141 (82.45%) had active lesions at presentation. Of 141 eyes, 115 (81.56%) showed vitreous inflammation. Lesions were multifocal in 133 eyes (94.3%), were noncontiguous to optic disc in 122 eyes (86.52%), and involved the macula in 125 eyes (88.65%). Of patients receiving ATT, all showed resolution of lesions and 9 (9.7%) developed recurrences (median follow-up, 21 months). In addition, 12 patients (12.9%) showed continued progression over a median 3.5 weeks after initiation of therapy. Of 12 patients treated with corticosteroids alone, none showed progression but 9 (75%) developed recurrence (median, 26.5 months). Final visual acuity of ≥ 6/12 was achieved in 108 eyes (76.60%) versus 72 eyes (51.06%) before treatment. Fovea was spared in 95 of 125 eyes (76%) with macular involvement. Five eyes (3.5%) developed choroidal neovascular membrane. CONCLUSIONS: Tubercular serpiginous-like choroiditis presented as multifocal serpiginoid choroiditis affecting predominantly young to middle-aged men. It was frequently bilateral with vitreous inflammation and characterized by multifocal lesions that were noncontiguous to the optic disc and showed serpiginoid spread. Antitubercular therapy significantly reduced recurrences. Lesions responded to combined antitubercular and steroid therapy, usually spared fovea, and had a good final visual acuity.

Long-term close follow-up of chorioretinal lesions in presumed ocular tuberculosis.

PURPOSE: To evaluate the long-term outcome (up to 7 years) of presumed ocular tuberculosis (TB) when the therapeutic decision was based on WHO guidelines. METHODS: Twelve out of 654 new uveitic patients (1998-2004) presented with choroiditis and positive tuberculosis skin test (TST) (skin lesion diameter >15 mm). Therapy was administered according to WHO recommendations after ophthalmic and systemic investigation. The area size of ocular lesions at presentation and after therapy, measured on fluorescein and indocyanine green angiographies, was considered the primary outcome. Relapse of choroiditis was considered a secondary outcome. The T-SPOT TB test was performed when it became available. RESULTS: Visual acuity significantly improved after therapy (p=0.0357). The mean total surface of fluorescein lesions at entry was 44.8 ± 20.9 (arbitrary units) and decreased to 32.5 ± 16.9 after therapy (p=0.0165). The mean total surface of indocyanine green lesions at entry was 24.5 ± 13.3 and decreased to 10.8 ± 5.4 after therapy (p=0.0631). The T-SPOT TB revealed 2 false TST-positive results. The mean follow-up was 4.5 ± 1.5 years. Two relapses out of 10 confirmed ocular TB was observed after complete lesion healing, 2.5 years and 4.5 years after therapy, respectively. CONCLUSIONS: A decrease of ocular lesion mean size and a mean improvement of VA were observed after antituberculous therapy. Our long-term follow-up of chorioretinal lesions demonstrated relapse of ocular tuberculosis in 10% of patients with confirmed ocular TB, despite complete initial retinal scarring.

Continuous progression of tubercular serpiginous-like choroiditis after initiating antituberculosis treatment.

PURPOSE: To describe the frequency, risk factors, management, and outcome of eyes with tubercular serpiginous-like choroiditis showing continued progression following initiation of antituberculosis treatment. DESIGN: Retrospective, comparative, interventional case series. SETTING: Institutional. PATIENT POPULATION: One hundred ten patients of serpiginous-like choroiditis with 1) complete records, 2) tuberculin skin test, 3) active lesions in at least 1 eye, and 4) minimum 18 months follow-up. INTERVENTION: Based on the positivity of tuberculin skin test, the patients were categorized in Group A (84 patients with positive tuberculin test) and Group B (26 patients with negative tuberculin test). Of the 84 patients in Group A, 19 received systemic corticosteroids while 65 also received 4-drug antituberculosis treatment in addition. All patients in Group B received corticosteroids. Patients with continued progression received an increased dose of corticosteroids with or without immunosuppressive agents. MAIN OUTCOME MEASURE: Development of continued progression. RESULTS: There were 61 men and 23 women in Group A and 19 men and 7 women in Group B. Continued progression was observed in 12 patients (14.28%) in Group A and none in Group B (P = .04). Of the 12 patients in Group A showing progression, 11 (16.9%) were receiving antituberculosis treatment and corticosteroids. The lesions responded in all eyes, and final visual acuity of 20/40 or better could be achieved in 10 eyes (75%). CONCLUSION: Continued progression of choroiditis lesions occurs in 14% of patients after initiating antituberculosis treatment in tubercular serpiginous-like choroiditis. Increased immunosuppression with continuation of antituberculosis treatment resulted in good outcome.

Anti-tuberculous therapy combined with systemic corticosteroids improves retinal sensitivity in patients with active presumed tuberculous choroiditis.

To investigate the efficacy of anti-tuberculous therapy and systemic corticosteroids in patients suffering from active presumed tuberculous choroiditis by the assessment of central retinal sensitivity and fixation characteristics. Six patients (six eyes) with active presumed tuberculous choroiditis were treated with anti-tuberculous therapy and systemic corticosteroids. Mean central retinal sensitivities and fixation stability and location were investigated with MP-1 microperimetry before and after treatment. After a mean follow-up of 11.33 ± 7.53 months (range 6-24 months), all eyes showed resolution of inflammation, with no recurrences, associated with a significant improvement in visual acuity (P = 0.003). At the baseline, mean central retinal sensitivities were 2.03 ± 2.46 dB (range 0.0-6.6 dB). Fixation was stable and predominantly central in three eyes, and unstable and predominantly eccentric in three eyes. After treatment at a mean of 9.33 ± 6.56 months (range 4-20 months), mean central retinal sensitivities improved to 9.65 ± 5.35 dB (range 2.4-15.2 dB) (P = 0.004) and fixation became predominantly central and stable in all eyes. Anti-tuberculous therapy combined with systemic corticosteroids improves central retinal sensitivity and fixation characteristics in patients with presumed tuberculous choroiditis.