Colour vision restrictions for driving: an evidence-based perspective on regulations in ASEAN countries compared to other countries.

Colour vision deficiency is an impairment in discriminating colours. Beyond occupational opportunities, colour vision-based restrictions may limit driving, which is a daily task for many people. This review aims to compare existing colour vision requirements for obtaining a driving license in southeast Asian countries to the rest of the world. Subsequently, to review existing published literature and provide evidence-based recommendations for future guidelines for colour-deficient drivers. Color vision requirements for obtaining a driving license vary widely amongst countries. While colour-deficient drivers may face mild challenges in driving, increased awareness and developing effective compensatory strategies could enable them to drive safely. The current evidence does not support a strict exclusion of all colour-deficient individuals from driving. Instead, emphasis is needed on screening to increase awareness and insight into their disability. Future studies should consider compensatory adaptive strategies that are specific for high-risk situations such as challenging driving conditions.

The Effect of Citicoline on Ethambutol Optic Neuropathy: Histopathology and Immunohistochemistry Analysis of Retina Ganglion Cell Damage Level in Rat Model.

Purpose: Ethambutol therapy in certain doses and period can cause bilateral ocular intoxication. There is no definitive therapy that has been found to prevent damage to retina neuronal cells in ethambutol optic neuropathy (EON) cases. Citicoline is thought to have a potential effect to maintain retinal neuron cells. This study aimed to analyze the effect of citicoline on damaged rat ganglion cells in EON. Methods: An experimental study of 15 Wistar rats was divided into 3 groups: the nontreatment group (A), the ethambutol (35 mg/kg/day) group (B), and the ethambutol (35 mg/kg/day) and citicoline (1 g/kg/day) group (C). Groups B and C were given treatment orally for 30 days, then a histopathology examination was performed to analyze retinal ganglion cell (RGC) density, and immunohistochemistry to assess bcl-2 and caspase-3 expression. Results: RGC density of rat with ethambutol intoxication that received citicoline was higher than those who did not get citicoline (P < 0.001). The rat retina ganglion layer without citicoline administration is thicker than the one with citicoline, the increase in thickness is due to the formation of vacuoles in the cytoplasm of ganglion cells. Rat with citicoline obtained higher bcl-2 ganglion expression, and lower caspase-3 expression compared with rat without citicoline. Conclusions: The ganglion cells damage process caused by EON can be suppressed by citicoline administration. It was proven by analyzing RGC density, ganglion layer thickness, and expression level of bcl-2 and caspase-3 on rat model.