[Home](./index.md) > [puppeteer](./puppeteer.md) > [Protocol](./puppeteer.protocol.md) > [Emulation](./puppeteer.protocol.emulation.md) > [SetEmulatedVisionDeficiencyRequest](./puppeteer.protocol.emulation.setemulatedvisiondeficiencyrequest.md) ## Protocol.Emulation.SetEmulatedVisionDeficiencyRequest interface Signature: ```typescript export interface SetEmulatedVisionDeficiencyRequest ``` ## Properties | Property | Type | Description | | --- | --- | --- | | [type](./puppeteer.protocol.emulation.setemulatedvisiondeficiencyrequest.type.md) | ('none' \| 'achromatopsia' \| 'blurredVision' \| 'deuteranopia' \| 'protanopia' \| 'tritanopia') | Vision deficiency to emulate. (SetEmulatedVisionDeficiencyRequestType enum) |